1. Fifth Wheel King Pin
  2. Reese
  3. 1621
  4. Lippert
  5. Reduces Bounce and Jarring
  6. 16000 lbs GTW
5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity

5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity

Item # 5AB-E1621-16K
lowest price pledge
Retail:$1,100.78
Our Price: $750.01
You Save: $350.77
Fifth Wheel King Pin
This item qualifies for Free Shipping
Shipping Weight: 104 lbs
Quantity: 
In Stock, Ships Today
Reese Cushioned Fifth Wheel King Pin - 5AB-E1621-16K
zoom in icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

The 5th Airborne premium fifth wheel air-ride extended pin box coupler acts as a buffer between the tow vehicle and the trailer, minimizing the abuse sustained from turbulence on the road and giving you the smoothest ride possible by reducing shock. Call 800-298-8924 to order Reese fifth wheel king pin part number 5AB-E1621-16K or order online at etrailer.com. Free expert support on all Reese products. Guaranteed Lowest Price and Fastest Shipping for 5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (56)
  • Q & A (111)
  • Videos (2)
  • Photos
  • Why etrailer?

Reese Fifth Wheel King Pin - 5AB-E1621-16K

  • 1621
  • Lippert
  • Reduces Bounce and Jarring
  • Reese
  • 16000 lbs GTW
  • Pin Box Upgrade
  • Cushioned
  • Fixed Turret

The 5th Airborne premium fifth wheel air-ride extended pin box coupler acts as a buffer between the tow vehicle and the trailer, minimizing the abuse sustained from turbulence on the road and giving you the smoothest ride possible by reducing shock.


Features:

  • Pre-assembled for quick and easy installation
  • Bolts onto trailer using existing holes and hardware
  • Cushions shock with adjustable air spring and shock absorber
    • Reduces longitudinal shock (chucking) by nearly 60%
    • Decreases vertical shock by 44%
    • Relieves stress on coach frame
    • Reduces vibration inside coach and protects contents
    • Smoother ride means less fatigue for driver and passengers
  • Air spring is enclosed within the coupler for protection against the elements
  • Pin box has built-in friction-sway control
  • Streamlined, aerodynamic design


Specs:

  • Capacity: 16,000 lbs; CSA approved
  • 3-Year limited warranty
  • Designed for use with the following pin boxes:
    • Lippert 1621 (15.5K Pin Box)



Note: It is recommended that if sitting idle for more than a week, the air springs should be drained to relieve pressure on the system.


Fifth Airborne diagram

5th Airborne Premium Fifth Wheel Air-Ride Coupler
1. Rear mounted, heavy-duty shock absorber
2. Enclosed air spring also absorbs shock
3. King pin - connects to the fifth wheel trailer hitch in the truck bed
4. Pivot point - allows king pin to move up and down





5AB-E1621-16K 5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity



5AB-E1621-16K Installation InstructionsInstallation Details 5AB-E1621-16K Installation instructions


California residents: click here


Video of 5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for 5th Airborne Premium Fifth Wheel Air Ride Coupler Installation

Today were going to install part number 5AB-E1621-16K. This is a 5th Airborne Premium 5th Wheel Air Ride Coupler. Before we take out the old pin box well get a measurement from the bottom of the pin box down to the ground so we can match her a new one to the same height. Were going to start off our install by removing the original pin box. Well also remove the breakaway switch. Well just unbolt it and just let it hang off to the side for now and also removing the wires for electrical.

Well go ahead and loosen up all the bolts for the pin box, but leave the bolts inside until we get an extra set of hands to help lower the original pin box. We can go ahead and remove the pin box now. Well go ahead and discard the old hardware and reinstall the new pin box. Well install the new hardware with the new bolts, flat washers, lock washers and nuts. Well go ahead and install the pin box to the original location and well get a measurement.

It looks like the new pin box is about an inch shorter than the original one so well go ahead and lower it down to maintain the same height as before. Once thats settled well go ahead and tighten down the bolts. Then well torque the bolts down as specified in the instructions. At this point we can go ahead and reinstall the breakaway switch. Well just attach it to the side of a coupler with a fresh self tapping screw and then we can go ahead and reroute the wiring back in.

Well go ahead and add some air to the air bag. Well go about 60 lbs and you can see how far it raises up. Then well go ahead and take it for a test spin and make any adjustments if needed afterwards and thats what it takes to install our 5th Airborne Premium 5th Wheel Air Ride Coupler part number 5AB-E1621-16K.


Customer Reviews

5th Airborne Premium Fifth Wheel Air Ride Coupler - 16,000 lbs Capacity - 5AB-E1621-16K

Average Customer Rating:  4.7 out of 5 stars   (56 Customer Reviews)

The 5th Airborne premium fifth wheel air-ride extended pin box coupler acts as a buffer between the tow vehicle and the trailer, minimizing the abuse sustained from turbulence on the road and giving you the smoothest ride possible by reducing shock.

- 5AB-E1621-16K
by:

My unit is 12000lbs loaded. Install is not difficult with 2 people. Ride much improved and NO chucking. I was also able too find the exact part number on [other website] and etrailer priced matched it %110, so I got a great deal on top of it. 708343



- 5AB-E1621-16K
by:

So far so good. I did have to contact Reese hitch because air bag was leaking down. Reese sent me another air bag and everything seems good. I put in 80psi when we travel and it seems to do a good job. Takes some back in forth out plus bounce. etrailer has always done me right. Thanks etrailer 667106



- 5AB-E1621-16K
by:

Easy to install on my Jayco 26.5 BHS. It was exactly what I needed to work with my B&W companion fifth wheel plate. Rides great and was able to help with the height adjustment to get my camper more level while in tow. No chucking at all. I greatly appreciated the fast shipping too to get me on the road for my trip! Ordered on Tuesday received on Thursday!! 666389



- 5AB-E1621-16K
by:

This hitch has made a HUGH difference! 662323



- 5AB-E1621-16K
by:

No complaints. Works great 651166



- 5AB-E1621-16K
by:

Works excellent 85 psi works perfect. Very smooth ride no more chucking. 633881



- 5AB-E1621-16K
by:

I pull a 34’ Reflection 5th wheel that is within the rated towing capacity for my 3/4 ton GMC, although I noticed it would bottom out when I went over abrupt bumps at highway speed. I added rear stiffeners to help that issue, but wanted to soften up the effect on the trailer by adding a cushioned pin box. I decided on the 5th Airborne to provide that softening effect. After a year in service I’ve noticed a big improvement in the ride, while the bouncing of the trailer is greatly reduced. The pin box was light enough for easy installation, while tough enough for the service. I have over 5,000 miles on it now and it is still working perfectly. 602491



- 5AB-E1621-16K
by:

Install was easy only took about a hour,with proper tools big help.I haven't been able to use it because of weather,but was in good condition and seems to be what I needed.Thanks etrailer as usual. 498854



- 5AB-E1621-16K
by:

Very well made pin box. Only had it on my 5th wheel for a month & traded the rig for a new 2017 fiver. It worked GREAT for the two trips we had it on the trailer. I removed this Reese pin box thinking that I may use it on my new rig, but the new fiver came with a similar air suspension box, so this one has been sitting in my garage for 10 months. Anyone want a “like new” Reese air ride pin box for $400.00, please let me know. 481097



- 5AB-E1621-16K
by:

Installed the airbourne & went for a ride.Definitely works well reducing the chucking between truck & trailer aswell as the up & down bounce.Had alittle trouble adding air to the bag but that might of been my air chuck.Packaging was damaged,torn box but the product was ok after inspection.I read a question from another buyer whether to add the req.air before or after the trailer is on the truck.Your tech. advised to add air first before hitching trailer to truck then reduce pressure as req.which helped me with the set-up. It's the end of the camping season so I will have to wait until next summer to try it somemore,otherwise very satisfied at this point. Greg C. 441747



- 5AB-E1621-16K
by:

The air valve stem would not accept air. Replaced the valve core to correct the problem. Fiberglass fairing on LongHorn 5th wheel would not fit new king pin box as it is longer that the original one. Just finished about 3500 miles with this new King Pin box, finding the ride somewhat improved, especially on rough freeway often found going through big cities. Did installation myself by first pushing box onto hitch, then using truck positioning and trailer jacks, was able to get box into correct position. Later repeated the exercise to lower the box one row of bolt holes to better match original king pin height. 439109



- 5AB-E1621-16K
by:

Provides superior ride. No more chucking. Only problem is it leaks air some. Have to recharge after camping a week. 427343



- 5AB-E1621-16K
by:

This pin box made a tremendous difference in my fifth wheel trailer. With the original pin box, the trailer controlled the truck and now it is the other way around. Now instead of huge jerks on rough roads, I get cushioned bumps. I can look in the rear view mirror and see the pin box absorbing the bumps. 425634


Comments
After a year, I still love this product. The best improvement I have made on my 5er.
Larry L - 08/29/2018

42946

- 5AB-E1621-16K
by:

I purchased this based on price and reviews I read. Definitely helps with the ride! Alot less bucking and chucking over dips and bridge crossings. I did have to do a bit of tinkering with air pressure in the bag and location of the bag to get the ride right. This is the reason I didn't give it 5 stars. Access to the lower air bag bolts are a pain to get at. Luckily I'm an auto technician and have a wide variety of tools to do it. I don't know how anyone would do this with a basic rachet without a flex head. If Reese ever redesigns this pin box they should add some access holes to the bottom for this adjustment. Only other issue is small.....the pin box interferes with my b&w release pin. Not a big deal, just have to put the lock pin in upside down. This box extends further past the pin 399696



- 5AB-E1621-16K
by:

Air fill valve was damaged in shipment ( as mentioned in many reviews). Etrailer had mfg send a new one overnight. I suggest that you ship with the fill valve not installed, having the customer install it when attaching to 5th wheel. Mfg sticker specifies that the attaching bolts be torqued to 200 ft. Lbs. Had to rent a torque wrench to install, thanks to my nephew, he was able to to apply enough pressure to achieve that setting. Hard for an old retired person to exert that much force. Now the good stuff. We traveled from California to New York. By the time we got there, my back was in bad shape due to the severe chucking. Ordered the pin box to be delivered to one of our Campground stops. We're now half way home, and my back is not hurting at all. Chucking is gone, great product! 391998



- 5AB-E1621-16K
by:

The Reese 5th Airborne pin box made the ride so much smoother then al the chucking me bouncing I had before. The order arrived quickly and was easy to install. Minor damage to the air stem in shipping that was no fault of etrailer, but was able to air up the bladder. Great investment for a smoother ride. 364903



- 5AB-E1621-16K
by:

Made an incredible improvement to the ride. The trailer rode very rough and had tremendous bouncing on the truck prior to installing the pin box. Money well spent! 349930



- 5AB-E1621-16K
by:

Read several reviews and decided to go with the Reese airborne. Have purchased from etrailer before and always had great service. Pin arrived in a week and the price was better than any place else. 342280


Comments
Great, will not be without one
Mike F - 02/15/2018

34731

- 5AB-E1621-16K
by:

The 5th wheel airborne king pin was straight forward to install. The product did help with the trailer chucking by absorbing some of the bounce. I did have a problem with the first time I used it with the bladder not holding air. Called customer service and had me test the inner air valve and it turned to be a bad valve, replaced it and it now works properly. I believe that the valve problem was caused by cold weather as it was 10 degrees below zero when we I tried to fill the bladder to leave on our trip to warmer weather. I am still trying to work on the amount of air to inflate the bladder to give the optimum ride. I recommend the product. 330248



- 5AB-E1621-16K
by:

Product work OK but the paint is peeling off in chunks on the plate that contacts the hitch surface and it's rusting badly. 322554



- 5AB-E1621-16K
by:

I had a Fabex 5th airborne hitch pin on my other 5th wheel and was very pleased. Bought new 5th wheel and put on Reese 5th airborne hitch pin expecting the same performance, but the Reese does not perform as well as the old one. I have tried different air pressure and different air bag positions but cannot not find the smoothness I had with the old one. Also, I have had to touch up paint because of rust causing the paint to chip and come loose in certain areas. Just wish I could give it a better review. 318043


Comments
I am sorry to say that I am not happy with this product. Although it is only one year old the paint has faded and it looks much older. I continue to touch up, have tried waxing it but believe at some point I will have to replace with another brand or re- paint. Guess I just got a bad one.
djmc - 11/19/2017

31079

- 5AB-E1621-16K
by:

This Reese Air king pin has made a different over my rigid pin. I believe it does just what it was advertise to do. Ride is more soft and controlled. I like it and would recommend it to any one. For the cost it is a good choice. 299671



- 5AB-E1621-16K
by:

I bought the Reese fifth wheel king pin for a upgrade to the factory one. It was easy to install. What a big difference it made. After some adjustments, as per the instructions, no more chugging or very little. Now enjoy traveling with the Fifth wheel. 291401


Comments
Still enjoying the Reese fifth wheel kingpin. When we are done for the season I let the air out of the airbag and refill in the spring. Has a little bit of surface rust on it. Will sand and paint. Still a great product.
Marie W - 10/05/2017

28762

- 5AB-E1621-16K
by:

Regretfully we sold the trailer and never got to use itc 285650



- 5AB-E1621-16K
by:

Money well spent!!! Had it for over a year, still very happy. Towing much more comfortable. The only issue was the fill tube was damaged in shipping. Received a replacement but that one was damaged also. No fault to the seller, the item was not protected from damage by the packaging. Very pleased with the product! 263771


25
58
Show More Reviews

Ask the Experts about this Reese Fifth Wheel King Pin

  • Best Pin Box Upgrade for a Lippert 1621 on a Grand Design Reflection 303RLS
    The best replacement pin box for the Lippert 1621 on your Grand Design Reflection 303RLS is a 5th Airborne from Reese. These pin boxes have an adjustable air spring and shock absorber which will reduce the back and forth chucking (stopping and taking off) by 60% and lower the shock from bumps by 44%. This not only helps to give you a great towing experience, but it also helps to reduce the vibration inside the coach. When I looked up your Grand Design it looked like the GVWR was just...
    view full answer...
  • Fifth Airborne Pin Box Replacement for 43 Dutchmen Voltage Toy Hauler
    Since your serial number start with 028 you have a Lippert 1621HD pin box. Since your trailer weighs 21k you'd need then the 21k 5th Airborne for the 1621HD pin box replacement part # 5AB-E1621-610. I attached an install video for this pin box for you to check out as well.
    view full answer...
  • Will Upgrading 1621 Pin Box on 2017 Crusader Lite Allow 5th Wheel to Sit Level
    I reached out to my contact at Lippert who said that the correct pin box for your 2017 Crusader Lite is the 1621 # LC1191191. Although we do have replacement pin boxes and pin box upgrades, like the 5th Airborne Premium # 5AB-E1621-16K, I have a few things for you to check first. There are some adjustment holes on the wings of the pin box so you can try adjusting the height of the pin box. Most 5th wheel hitches have height adjustment options as well so that is something else you can...
    view full answer...
  • Comparison Between 5th Airborne and Trailair Flex Air 5th Wheel Air Ride Pin Boxes
    Generally speaking, the Trailair Flex Air and the 5th Airborne Fifth Wheel King Pins serve the same function. Both use shock absorbers and air bags to help isolate the tow vehicle from the road shocks experienced by the 5th wheel. This makes for a much smoother and more pleasant ride. However, the Trailair Flex Air goes a step further by allowing the king pin plate to pivot fore and aft. This helps further reduce chucking over and above what the Fifth Airborne does. Since you've towed...
    view full answer...
  • What Causes a 5th Airborne Premium Fifth Wheel Air Ride Coupler To Lose Air Pressure
    If you are having issues with loosing air out of the 5th Airborne Premium Fifth Wheel Air Ride Coupler part # 5AB-E1621-16K then you would need to inflate the airbag and then spray this and the fittings down with a soapy water solution. There should be bubbles forming where the leak is present. Most likely, the leak is coming for one of the fittings like part # 58382.
    view full answer...
  • Replacement Upgraded Pin Boxes for a Lippert 1621 Pin Box
    Trailair Flex Air 5th Wheel Pin Box # LC328484 is actually not the correct model to replace the Lippert 1621 pin box. Instead it fits the Lippert 0719 pin box so it will not work with your trailer. For your 1621 pin box there are more options: # LC328492 rated for 18,000 pounds # 5AB-E1621-610 rated for 21,000 pounds # 5AB-E1621-16K rated for 16,000 pounds # LC158778 rated for 21,000 pounds # LC328330 rated for 18,000 pounds # LC328329 rated for 21,000 pounds The TrailAir and...
    view full answer...
  • Best Fifth Wheel Pin Box Replacement Recommendation for a Lippert 1621 Pin Box
    If you are looking for the best fifth wheel pin box to replace your Lippert 1621 that will provide the smoothest ride quality and won't break the bank I would recommend the new Trail Air Flex Air part # LC328492. This pin box works to fight and prevent vertical and horizontal chucking to provide you with a very smooth ride quality. I attached a demo video for more info. Since you have a short bed truck I believe the best option would be a Sidewinder Pin Box with a 5th Airborne Air Ride...
    view full answer...
  • Best Aftermarket Pin Box Recommendations for Lippert 1621 Pin Box Replacement
    First, Trailair is the manufacturer. We get them from Lippert. They are similar setups. Both the 5th Airborne and the Trailair king pins have an airbag and shock. The main difference is the position of these components in the unit. The Trailair units have the shock and airbag more at the front which seems to provide better cushioning against road shock, vertical and horizontal shock and chucking. Either unit will provide an increase in ride quality and reduce the stress on the on the...
    view full answer...
  • 5th Wheel Cushioned Pin Box to Replace Fabex 730
    We do offer a cushioned 5th wheel pin box that is a direct bolt-on replacement for the Fabex 730, the Trailair Air Ride 5th Wheel Pin Box # UF35-946215. This cushioned pin box is rated for 21K and it will substantially reduce bounce when you tow and also reduce road shock. It will not require any drilling for installation. I also linked our page showing trailer suspension enhancement kits like the Dexter E-Z Flex # K71-652-00 and the Lippert Equa-Flex # LC279688 as well as some help...
    view full answer...
  • Installation of Easy Fill Retro Fit Kit for 5th Airborne # 58382
    We do not have any videos of the Easy Fill Retro Fit Kit for 5th Airborne # 58382 but it is basically a length of air hose to allow easier access to the inflation valve. This kit fits the 5AB-S and the 5AB-E pin boxes. This will allow you to make the inflation valve accessible like the newer model # 5AB-E1621-16K that has the valve on the driver's side of the pin box instead of underneath. It simply attaches under the air spring and moves the inflation valve location to ensure proper...
    view full answer...
  • Recommendations for Less Chucking On Cougar 5th Wheel with Lippert 1621 Pin Box and 2016 GMC 1500
    For your 2016 GMC 1500 with 5-1/2 Foot Bed, the B&W Gooseneck along with the B&W Companion are not a fit for your truck. If you have the 6-1/2 foot bed, then they are confirmed to fit. With a 5-1/2 foot bed, it is strongly recommended to use a fixed hitch and a Sidewinder pin box replacement to give you the turning clearance. A Sidewinder cannot be used with a Gooseneck hitch and adapter. Here are your options: 1- Remove the gooseneck hitch and install bed rails like the Reese...
    view full answer...
  • Differences Between 5th Airborne Fifth Wheel Air Ride Couplers # 5AB-E1621-16K and # 5AB-E1621-610
    I spoke with my contact at 5th Airborne about Fifth Wheel Air Ride Coupler, # 5AB-E1621-16K and # 5AB-E1621-610. he stated that they have the same air bag and shock. The difference is that the 21k capacity version, # 5AB-E1621-610, is constructed to be able to handle the higher capacity. For your trailer, the 16k, # 5AB-E1621-16K, would work well. I have included a link to installation details for you to view.
    view full answer...
  • Sidewinder Recommendation to Replace a Lippert 1716 Pin Box
    I did some research on the pin box you have and it looks like you will need a Sidewinder part # RP61410. This is confirmed to fit on the Lippert 1716 pin box that would have been on your trailer prior to the Mor Ryde being installed on it. I attached a review video and an FAQ on Sidewinders for you to check out also.
    view full answer...
  • Replacement Air Valve For 5th Airborne Premium Fifth Wheel Coupler
    If you need to replace the valve or repair a broken air line on your 5th Airborne Premium Fifth Wheel Air Ride Coupler, part # 5AB-E1621-16K, we have a repair kit designed to do the job. I recommend the Fifth Gear Easy Fill Retro Fill Kit, part # 58382. This is designed to fit both the 5AB-S and 5AB-E Pin Boxes, and provide easier access to the inflation valve.
    view full answer...
  • What is the Difference Between the Standard and Air-Ride 5th Wheel King Pin
    The stock Lippert 1621 pin box and air-ride pin boxes have some differences. For example, the Lippert 1621 5th wheel pin box # LC1191191 is a direct replacement for a worn out pin box. Whereas the Fifth Gear 5th wheel air ride coupler # 5AB-E1621-16K will have cushioned shocks with an adjustable air spring and shock absorber. Therefore, reducing longitudinal shock or chucking by nearly 60 percent and decreasing vertical shock by 44 percent. I included a video review about the Fifth...
    view full answer...
  • Adjusting the Air Spring in a 5th Airborne Premium Fifth Wheel Coupler for a Level Trailer
    To level your 13k 5th Wheel trailer, start with 80 to100 psi (but do not exceed 120 psi). Add air until the skid plate is level. If the ride you experience is too soft (keeps bottoming out), add more pressure. If the ride is too rough, remove pressure until you reach a comfortable medium between too soft and too hard. I call this the Goldilocks Phenomenon. If adjusting the pressure does not provide a satisfactory level ride, try to reposition the air spring. If the pin weight is heavy,...
    view full answer...
  • 5th Airborne Recommendation for a Lippert 1621HD Pin Box
    The difference between the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-610 and the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-16K is the weight capacity and a different bolt pattern. You would want the # 5AB-E1621-610 since your pin box is a 1621HD. The # 5AB-E1621-16K is only designed to work with the 1621 pin box so I would not recommend it for you.
    view full answer...
  • 5th Airborne Recommendation for a Mor/Ryde SPB-1621LD
    Both the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-610 and # 5AB-E1621-16K would work on your Mor/Ryde with a 1621LD pin box. The main difference between these two is the weight capacity, and since the GVWR of your trailer is 12,000 lbs the # 5AB-E1621-16K would probably make more sense for you since it has more than enough capacity for you. I attached installation instructions, an install video and a review video for this product for you to check out also.
    view full answer...
  • Best Option to Improve Ride When Pulling Fifth Wheel Trailer With 2006 Dodge Ram 3500
    There are better options than a gooseneck adapter available for you to greatly improve your ride when towing your fifth wheel trailer with your 2006 Dodge Ram. I strongly recommend against installing a gooseneck hitch adapter and instead using an air ride, shock absorbing pin box. A great option for you would be the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-16K, which is a replacement for your Lippert 1621 pin box and is designed to significantly reduce the amount...
    view full answer...
  • Measuring to Determine Which Pin Box is on Fifth Wheel Trailer
    If there is not a sticker or stamp on your pin box which has the model on it, you can either call the manufacturer with your VIN and they should be able to tell you, or you can take some measurements and that will allow you to know what model is on your 2015 Primetime Spartan. I have added a link to a help article, "Measuring to Determine the Correct Replacement Pin Box for a 5th-Wheel Trailer" which details this process. That article will have you select the pin box style from a set of...
    view full answer...
  • Replacement Pin Box to Reduce Bouncing of 14K Big Horn 5th Wheel
    I am not aware of any industry specs on the maximum allowable flex. You might direct that question to the manufacturer of your fifth wheel. The exact replacement pin box you need would depend on the model number of your Lippert pin box, as there are several different model numbers with # 1621 being the most common. There should be a sticker or plate somewhere on the pin box that will list the model number. Since you are concerned about the bouncing, the Ultra-Fab TrailAir like part...
    view full answer...
  • What is Correct Air Pressure for 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E1621-16K
    The 5th Airborne Premium Fifth Wheel Air Ride Coupler, part # 5AB-E1621-16K, is a direct replacement pin box for the Lippert 1621 and is rated for king pin weights up to 4200-lbs. Air spring pressure can be adjusted between 80 psi and the maximum of 120 psi to achieve the smoothest ride. Add air if the ride is too soft; remove air if the ride is too stiff. A good starting point is about 90 psi. For reference I have linked the installation instructions for this pin box. I have also linked...
    view full answer...
  • Can a Cushioned Pin Box Be Used with the Demco Hijacker Autoslide on a 2018 Keystone Cougar 359 MBI
    The only type of pin box that you cannot use with the Demco Hijacker Autoslide 5th Wheel Trailer Hitch w/ Slider part # DM8550022 that you have on your 2016 Chevrolet Silverado 2500 is one with a rotating turret. However, depending on which type of pin box you choose there may or may not be a capture plate that is needed. For a cushioned pin box that will reduce chucking and jarring, I recommend taking a look at the 5th Airborne Premium Fifth Wheel Air Ride Coupler. This pin box will...
    view full answer...
  • Instructions / Fasteners for 5th Airborne Premium Fifth Wheel Air Ride Coupler, Part # 5AB-E1621-16K
    The 5th Airborne Premium Fifth Wheel Air Ride Coupler, Part # 5AB-E1621-16K, is not supplied with hardware. The manufacturer intends users to separately purchase new replacement hardware of the same size and grade as used on the original pin box. I have included a link to the instruction manual; please note this manual is generic and covers a number of different coupler products in addition to the # 5AB-E1621-16K. Installation is covered on pages 2 and 3, including torque specifications...
    view full answer...
  • Fifth Airborne Replacement Pin Box for Mor-Ryde 1621
    Other than the heavier duty spring/shock absorber in part # 5AB-E1621-610 which increases the weight capacity, part # 5AB-E1621-610 will bolt up to the Fabex 665,Lippert 1621 and 1621HD and the M&M 665. Part # 5AB-E1621-16K bolts up to the Lippert 1621 only.
    view full answer...
  • Clearance Issues With A 5th Wheel Sliding Hitch On A Short Bed Truck
    I am very sorry to hear about the mishap you have encountered. I do have a few solutions that will allow for 5th wheel towing on a short bed truck however, you will need to consider the use of an auto-sliding hitch or sidewinder king pin. I can assure you that you will not run into this problem again with my recommendations in addition to providing a much more cost effective option than the body damage that will occur from contacting the cab of your truck with the trailer. A sliding...
    view full answer...
  • Sidewinder Pin Box Replacement Recommendation to Replace a Mor/Ryde SPB72-1621LD
    Based on the part number you gave for your Mor/Ryde pin box it sounds like you have a pin box based on the Lippert 1621 pin box. Which then for the correct Sidewinder you would want the part # RP61420.
    view full answer...
  • Which Reese 5th Airborne Pin Box Fits as Replacement for Lippert 1621 Pin Box
    I have exactly what you are looking for, but the part # 5AB-E510-710 does not fit as a replacement for a Lippert 1621 pin box. Instead the part number that does fit the Lippert 1621 is the part # 5AB-E1621-16K so that is what you would need.
    view full answer...
  • Replacement Pin Box to Reduce Chucking on 5th Wheel Trailer with Lippert 1621 Pin Box
    For the Lippert 1621 pin box the most inexpensive option that will improve the chucking and overall ride quality when towing your 5th wheel trailer is the Rota-Flex, # LC328330. It uses a pivoting mechanism and rubber compound to dampen chucking. This version is rated for 18,000 pounds. there is also a 21,000 pound version, # LC328329. The next step up is the 5th Airborne # 5AB-E1621-16K which uses both a shock and an air bag to reduce chucking and vertical movement. It will be more...
    view full answer...

Do you have a question about this Fifth Wheel King Pin?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality fifth wheel king pin for the best price.

    Our Lowest Price Pledge ensures you will never overpay for the parts you need.
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate fifth wheel king pin information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Installed by:
Joe V
Installed by:
Randy B
Expert Research:
Mike L
Expert Research:
Michael H
Expert Research:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Video Edited:
Zack K
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Alexander C
Updated by:
Isabelle B
Video by:
Zach D

At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.