Price: $13.23

Master Lock Shrouded Padlock

Item # 37DAT

lowest price pledge

Retail:$15.24

Our Price: $13.23

37DAT Keyed Alike:

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master lock trailer locks  latch shrouded padlock
master lock trailer locks coupler shrouded padlock
master lock trailer locks coupler shrouded padlock
master lock trailer locks coupler 37dat
master lock trailer locks  37dat
master lock trailer locks coupler shrouded padlock
master lock trailer locks coupler shrouded padlock
master lock trailer locks coupler 37dat

In Use/Installed

trailer locks master lock coupler latch shrouded padlock
trailer locks master lock latch 37dat
trailer locks master lock latch 37dat

Customer Photos

master lock trailer locks coupler 37dat
master lock trailer locks coupler shrouded padlock

  • Coupler Lock
  • Standard Coupler Lock
  • Master Lock
  • Keyed Alike
  • Latch Lock
  • Steel
Master Lock Armored Shrouded Padlock Lowest Prices for the best trailer locks from Master Lock. Master Lock Shrouded Padlock part number 37DAT can be ordered online at etrailer.com or call 800-298-8924 for expert service.



Master Lock Trailer Locks - 37DAT

Master Lock Armored Shrouded Padlock


Features:

  • Armored hardened steel shackle defies cutting
  • 1-9/16" laminated steel body for superior strength
  • 4-pin tumbler cylinder helps prevent picking
  • Shackle guard protects against bolt cutters and hacksaws
  • Ideal for securing trailers, cables and chains


Specs:

  • Shackle with guard fits openings 1/2" in diameter or larger
    • Shackle guard is removable to accommodate openings 9/32" in diameter
  • Opening in the center of the lock measures 7/16" wide x 15/16" tall


Lock can be keyed alike so that the same key will work on multiple locks. Simply select the keyed alike option above and then enter the number of locks needed.


Note: Cannot key the locks to match other styles of locks. Keyed alike option will only match other 37DAT locks.


Product detail

Product detail

Product detail

Padlock shown on Reese 16K fifth wheel. With fifth wheel trailer hitches the 37DAT padlock can be used not only to lock the fifth wheel trailer to the hitch, but also to lock the fifth wheel hitch to the rails in the pickup truck bed when used with the Reese Pull Pin Lock Plates (# 58093).




37D Master Lock Shrouded Padlock







Economy - This item

Master Lock Shrouded Padlock


Master Lock Shrouded Padlock
Master Lock Trailer Locks

27 reviews

Code: 37DAT


Retail:$15.24

Our Price: $13.23


  • Trailer Locks
  • Coupler Lock
  • Keyed Alike
  • Steel
  • Standard Coupler Lock
  • Latch Lock
  • Master Lock


Master Lock Armored Shrouded Padlock

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Whether your trailer is being towed or being stowed, this rugged lock combo deters trailer theft. Heavy-duty steel coupler lock fully surrounds coupler when trailer is unhitched. Keyed-alike latch lock secures coupler to tow vehicle during transit.

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Video of Master Lock Shrouded Padlock


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




Video Transcript for Master Lock Shrouded Padlock Review

Today on our trailer we're going to take a look at the Master Lock Shrouded Padlock Part Number 37DAT. This is Master Lock's armor shrouded padlock. It's got a 1 9/16th laminated steel body for superior strength. A 4-pin tumbler helps prevent the lock from being picked, and the shackle guard protects against bolt cutters and hacksaws. Let's go ahead and try it on a few applications on our trailer. Here's our lock; here is the armor shielding, it goes all the way around the lock portion. This is 4-pin tumbler to prevent picking, and comes with two keys.

Note that it can also be keyed alike for multiple locks. Simply use the key to open up our lock, put it through the hole in our trailer handle, and lock it back up. Now with the shielding you can see it will prevent bolt cutters, hacksaws, from being able to cut though the lock portion and removing it. By removing the shield on the lock portion it makes it small enough, it will fit through the lock hole here on our trailer. Now we can use one lock to be versatile for the same trailer, or have multiple locks that are keyed alike, so we have one key for all the locks on our trailer. For the install, operation, and review of our Master Lock Shrouded Padlock Part Number 37DAT. .


Customer Reviews

Master Lock Shrouded Padlock - 37DAT

Average Customer Rating:  4.7 out of 5 stars   (27 Customer Reviews)

Master Lock Armored Shrouded Padlock

- 37DAT

by: Walter07/01/2013


I'm the owner of two boats which I trailer to and from the salt water. I have used the Master trailer hitch lock for security purposes and I believe it the be the best choice for theft prevention. The way this lock is designed there is no way to easily cut it off if installed properly. It will also withstand the salt water environment. Until I find a better pruduct this is the lock for me. I bought two locks keyed alike which is really helpful at just [...] each lock. 86910



- 37DAT

by: Mr. G03/09/2012


Of all the locks I have bought throughout the years, and all of the Master locks I have bought, this was the most disappointing !!!! Right out of the box this was CHEAP !!!! Being a multi-piece shackle it loses seems to lose its strength and in the open position it is like a 3 piece wet noodle. It seems all a burglar would need is a large pair of pliers to grab it and twist it right apart. I will be sending these right back in less than 2 hours of receiving them !!!! My search continues for locks for my enclosed trailer. Mr. G 33398



- 37DAT

by: Larry H01/05/2015


This review is going cover all the items in my recent order. As with every past order I placed with Etrailer the customer service continues to be excellent. Items ordered are high quality and the pricing is competitive with any vendor on the internet. The internet site is very easy to navigate and use of reviews of products is extremely helpful. I am a past customer and will remain a faithful customer from this day forth. Thanks Etrailer for the great variety of products and the Super Fast Shipping. 167768



- 37DAT

by: Jim B.11/30/2012


These are the locks I have been looking for in the Chgo area. Most marine use inventory is quite limited in the Chgo area this time of year. I will be using these locks on my hitch, trailer and boat accessories. I am very pleased with the quality, pricing, speed and ease of doing business with etrailer.com on these purchases. I highly recommend them for trailer equipment purchases. 60328



- 37DAT

by: Steve06/01/2016


This lock is a ton stronger than others locks I have bought with the beveled ridged pin and slide on lock, they just bend too easy. This one sure won't do that. Great lock, great price and fast shipping. 255403



- 37DAT

by: John H04/06/2014


Product was exactly what I was looking for and not able to find locally. Shipped promptly and I will definitely look to etrailer.com for future needs. Great product....Great Service.......! 123980



- 37DAT

by: Bernie W.06/15/2012


Product is to replace a lock I lost. I impressed with the speedy delivery from etrailer.com but perhaps it's the proximity to my location. I recommend them. BW 44290



- 37DAT

by: glenn F.02/05/2015


service from etrailer could not have been better. shipping was very fast and delivery fast. I will be glad to do business with etrailer in the future. 172534



- 37DAT

by: shu06/27/2016


love this lock for my boat trailer. I lost the old one just like it that I had for 35 years. great product and hope to have this forever! 265632



- 37DAT

by: Hunter09/16/2014


My order was received in perfect condition and everything worked as advertised. Very happy with Etrailer and their products. 151276



- 37DAT

by: chris n10/26/2013


This is the second lock like this that I own. They have held up well to the different climates here in HA. Great product. 105279



- 37DAT

by: Craig S03/20/2017


I ordered 3 locks all keyed the same for my new cargo trailer. It was a great option to have and super fast delivery! 359202



- 37DAT

by: chuck m.03/02/2012


Got my four matching locks as ordered today. Very easy and quick to work with. Thanks for your service. CM 33018



- 37DAT

by: Jim C.07/23/2011


Pretty much what I had expected. This was the specific product that I was looking for. 20015



- 37DAT

by: Richard Heinkel05/02/2014


Order Was Shipped Promptly + Was Perfect! Thank You, Will Buy Again 128538



- 37DAT

by: JC06/26/2016


Lock in service one full year and is holding up well on our shed 265174



- 37DAT

by: David M.01/06/2015


Received my order on time and correct product. Thanks etrailer 167924



- 37DAT

by: Mike10/23/2014


Nice lock, an extra level of protection over standard locks. 157582



- 37DAT

by: Ken R05/03/2012


keeps prying boltcutters from having their way...Great lockset. 39295



- 37DAT

by: Mason08/13/2017


The lock sticks occasionally, but is still working. 423297



- 37DAT

by: John07/22/2016


great trailer lock great price fast shipping 274911



- 37DAT

by: Fred A.11/28/2016


Great product - does exactly as adverti sed! 320149



- 37DAT

by: Richard Giles Jr09/10/2014


Extremely fast and accurate experience 150594



- 37DAT

by: Andy07/09/2015


great speed on shipping worked great 210581



- 37DAT

by: Tom T08/23/2011


Like the key a like, good quality. 22595



- 37DAT

by: Mike B05/03/2014


Perfect replacement part 128784



- 37DAT

by: laura04/04/2013


i would buy another 74247


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Ask the Experts about this Master Lock Trailer Locks
Do you have a question about this Trailer Lock?


  • Coupler Lock to Protect a Boat Trailer Both at Home and at the Boat Ramp
  • What you could use is the HITCH-LOCK, # DL13980. With the plate angled up, the trailer is protected from someone trying to hitch up to it. When towing a trailer with the plate angled down, it prevents someone from removing the hitch ball already in the coupler. It can be used with the trailer hooked up or not. You will need to use a pad lock like # 37DAT with this HITCH-LOCK. It is also zinc plated for corrosion resistance so it would be good for a boat trailer. For a lock that can be...
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  • Availability of a Fifth Wheel Hitch Lock for a Reese Fifth Wheel Hitch
  • To swcure your fifth-wheel hitch in the bed of your truck you would need the Pull Pin Lock Plates (Qty 4) for Fifth Wheel Trailer Hitches with Rails, item # 58903. These lock plates work with the Reese 1/2 inch Pull Pins for 5th Wheels, item # 6014. You can use a standard padlocks or the Master Lock Shrouded Padlocks, item # 37DAT, which can be keyed alike for convenience when taking the hitch out of the truck.
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  • Recommended 5th Wheel Trailer Hitch for a 2011 Chevrolet Silverado 2500HD With 5th Wheel Prep
  • It looks like the 2011 Silverado models have an increased fifth-wheel towing capacity, so I would recommend going with a hitch rated up to 20000lbs, to take advantage of the upgrades they have included on the new models. The Reese fifth-wheel hitch # RP30081 would be a good choice for your application, and this can be installed using custom fifth-wheel rail installation kit # RP50066-58, which will mount to the existing holes in your truck frame. Luckily, Chevy even made some changes...
    view full answer...

  • Fifth Wheel Rail Compatibility Husky Versus Reese
  • Husky and Reese fifth wheel hitches both use industry standard bed rails, so the Reese Hitch should be perfectly compatible with your existing Husky rails. I've provided a photo showing the slot spacing on Reese rails. You can compare that to the side to side and front to back dimensions between the hitch mounting tabs. To provide a bit of security, in the future you can use the # 6014 pins, the # RP58093 pull pin lock plates and some # 37DAT padlocks. Even one of the pull pin lock...
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  • Fifth Wheel Rail Hitch Pin To Fit The Reese Pull Pin Lock Plates # RP58093
  • The Reese Pull Pin Lock Plates, part # RP58093 can be used on any 1/2 inch pull pin. It is installed in the cutout portion of the pin where the pin clip is normally installed. It is made to be locked with a padlock like the Master Lock Shrouded Padlock, part # 37DAT. The Hidden Hitch Fifth Wheel Hitch Replacement Pins and Clips, part # 6014, are the only pins I have and they are the only size pin that we use to attach our fifth wheel hitches to the base rails. They are 1/2 inch x 3-1/4...
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  • Will Any Fifth Wheel Hitch Fit in Reese Mounting Rails on a 2008 Chevrolet Silverado 2500HD
  • The Reese fifth wheel installation kits that are available for your 2008 Chevrolet Silverado 2500HD are the Reese Fifth Wheel Installation Kit, part # RP30035, which is a universal kit and the Reese Quick-Install Custom Base Rails and Installation Kit, part # RP50064-58, which is a custom install kit. Both installation kits will accept Curt, Draw-Tite, Hidden Hitch, Reese, Valley and Husky fifth wheel hitches. They will not work with any of the fifth wheel hitches that are designed...
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  • Latch and Hinge Recommendation For Converting Ramp Door to Swing Doors On Car Hauler
  • To convert the ramp door on your Wells Cargo Car Hauler to swing or barn doors, you will need some hinges and a latch. A lockable latch like the Polar Hardware Cam-Action Door Latch Kit # 383200 is a great option. This system features a bridge-type hasp to help prevent accidental opening and ensures a safe latching action. The black vinyl grip on the handle makes for a nice, comfortable grip. This will require a 3/4 inch standard pipe which can be obtained at a local hardware store....
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  • Changing a Trailer Ramp Door To Barn Doors On A 6x14 V-Nose Enclosed Trailer
  • To create barn doors out of your ramp door, you will need hinges and a latch. I suggest a latch/lock system like the Universal Cam-Door Lock for Enclosed Trailers - 1" Keeper, # 383200. This will use a 3/4 inch diameter pipe that you'll have to get at a local hardware store, but the bridge-type keeper prevents accidental opening and ensures safe locking action. It will also allow you to use a separate lock like # 37DAT to secure your cargo. We will also need hinges similar to Strap...
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  • What is the Shackle Size on the MasterLock 37DAT Lock
  • The shackle diameter is .435 inches, right about 7/16 of an inch.
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  • Recommended Coupler Lock For Adjustable Ball Coupler
  • The HITCH-LOCK Trailer Guard Coupler Lock by Dutton-Lainson # DL13980 is a great option for both keeping your trailer coupler locked in place and deterred from theft. You of course need an external padlock like the Master Lock Shrouded Padlock # 37DAT for this application. If you are just looking for a lock when the trailer is not coupled, I recommend the Trailer Coupler Lock - Gorilla Guard for 2" Couplers # 63228 or # 63227 in 2-5/16 inch.
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  • Availability of King Pin Locks and Pad Locks that are Keyed Alike
  • The only Fifth Wheel pin locks that we have that can be ordered keyed alike are the CT Johnson DeadBolt 5th Wheel Trailer King Pin Lock, item # KPL. Current pricing is available using the link provided below. I like the DeadBolt brand locks because the service provided by the manufacturer is second to none and rarely, when there is a problem they always do their best to accommodate me and the customer. A Trailer Hitch Receiver Lock, item # 7683, or a Trailer Coupler Lock, item # 7691, can...
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  • What Base Rail Locks Work With Reese Hitch and Rails?
  • The description of your lock makes it sound like you may have gotten a hitch receiver lock and not a fifth wheel pin lock. Fifth wheel pin locks need to have the same diameter as the pull pins, so you would need a 1/2" diameter pin lock. However, they also need to fit, and the Tow Ready Base Rail Lock # TR63254, for example, is not compatible with the Reese base rails # RP56001-53 on your 2016 Chevy Silverado. I recommend you take a look at the Reese Pull Pin Lock Plates # RP58093, which...
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  • Recommended 5th Wheel Trailer Hitch for a 2011 Ford F-150 with a 5-1/2 Foot Bed
  • You would be able to install a fifth-wheel hitch on your 2011 Ford F-150, but because the truck has a 5-1/2 foot bed, you would also need to install a Sidewinder king pin box on your trailer. I would recommend the Reese 20k fifth-wheel # RP30081. To use this hitch, you will first need to install Reese custom installation kit # RP50081-58. I am including links to the instructions for both for you to review. The sidewinder pin boxes are matched to the manufacturer and model of the...
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  • Weight of DeeZee Specialty Series Storage Box for Use in Back of 2012 Jeep Wrangler Unlimited
  • Your Jeep looks great! It looks like this box will fit perfectly. The overall weight of the DeeZee Storage Box # DZ6535P is 17 lb. and it is made from a sturdy poly-plastic. It's hard to tell from your photo what thickness of plywood you're using. Depending on the thickness of the plywood and the weight of the tools you'll be carrying, you may need to add some additional support. Plywood strengths vary based on thickness. The most popular thickness in home use is a 3/4" fir plywood....
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  • Recommended Tool Box and Mounting Method for Installation on the Back of an RV
  • You can use the linked page to see all tool chests that are generally suited to your application, but there are a few considerations for installing a tool chest on the back of an RV. First, you will have to have a sturdy rear bumper for part of the chest to rest on since the exterior surface of the RV will not be strong enough to handle its weight. You will also have to confirm that you can find and mount the box to structural elements inside the RV's outer skin. This is something to...
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  • Recommended Tool Box Compatible With 2016 Toyota Tacoma With Composite Bed
  • Your options are unfortunately limited with a composite bed, but I do have an option for you. I recommend the DeeZee Specialty Series Storage Box - Chest Style - Poly Plastic - 3.6 Cu Ft - Black # DZ6535P. For a larger box, you can use the DeeZee Specialty Series Storage Box - Chest Style - Poly Plastic - 10.4 Cu Ft - Black # DZ6537P. These boxes lock with a padlock like Master Lock Shrouded Padlock # 37DAT.
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  • Availability of Keyed-Alike 1/2-Inch 5th Wheel Hitch Locks
  • We do offer pin-style 5th wheel hitch locks such as Husky # HT31441 and Tow Ready # TR63254 but these cannot be keyed alike. However, we offer Reese Pull Pin Lock Plates for 5th Wheel Trailer Hitches, part # RP58093 sold as a set of four, that can be used along with the Master Lock Shrouded Padlock # 37DAT. This lock can be ordered in keyed-alike multiples by selecting this option from the drop-down menu.
    view full answer...

  • How Does the HITCH-LOCK # DL13980 Work
  • The HITCH-LOCK, # DL13980 does not have to be totally removed in order to hitch up to a trailer. With the plate angled up, the trailer is protected from someone trying to hitch up to it. When towing a trailer with the plate angled down, it prevents someone from removing the hitch ball already in the coupler. It can be used with the trailer hooked up or not. You will need to use a pad lock like # 37DAT with this HITCH-LOCK. It is also zinc plated for corrosion resistance so it would...
    view full answer...

  • How to Lock a Curt Spyder # 16085 to Fifth Wheel Rails
  • What I recommend you get to lock your Curt Spyder part # 16085 to the fifth wheel rails of your truck is the Reese Pull Pin Lock Plates # RP58093 and then use a pad lock like part # 37DAT to lock the pins that hold the spyder to your rails. Check out the picture I attached to see how these products all work together.
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  • Recommended Options To Securely Lock Cargo To 24x60 Curt Cargo Carrier for 2" Hitches
  • For an option to use with your Curt Cargo Carrier, # C18153, I recommend using an enclosed box like the DeeZee Specialty Series Storage Box - Chest Style - Poly Plastic - 3.6 Cu Ft - Black, # DZ6535P. This box is 35" long x 14" wide x 13" tall, and will require locks like the Master Lock Shrouded Padlock, # 37DAT, along with a cable lock or permanent mounting solution. Another option is the etrailer Cargo Bag w/ Mounting Straps - Weatherproof - 20 cu ft - 59" x 24" x 24", # 988501,...
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  • Can I Haul an Extension Ladder on the Pack'Em Ladder Rack for Exterior Side Wall of Trailer
  • Yes, as long as the ladder is not wider than 6-1/4 inches it will work for an extension ladder. Keep in mind that the weight capacity is 75 lbs per ladder as well. Most 28 feet and 32 feet extension ladders fall under this weight limit. This ladder rack does come with bungee cords to secure the ladders to the rack, but to help deter theft I recommend using the RockyMounts SteelBraid Cable Lock # RKY3850 with the Master Lock Shrouded Padlock # 37DAT. The Padlock can be keyed alike if...
    view full answer...

  • Do 5th Wheel Hitch Mounting Pins Have a Weight Rating
  • A set of pins like # 6014 that hold a 5th wheel hitch to the truck bed base rails does not actually have a weight/strength rating. Since the pins do not really bear any weight they work fine for any 5th wheel hitch, from a 16K to a 24K. The same We also have Lock Plates # RP58093 that can be used with a padlock like # 37DAT to lock your 5th wheel hitch to the rails. The other pin you referenced, Reese Head Mounting Pin part # 6020PIN, is rated for use with their 22K 5th wheel hitch...
    view full answer...

  • Lock Actuating Coupler On Trailer To Truck
  • For your trailer with adjustable ball to be locked to your truck while boating, I recommend the HITCH-LOCK Trailer Guard Coupler Lock by Dutton-Lainson # DL13980 along with the Master Lock Shrouded Padlock # 37DAT. This will work as long as you have a hitch lock on your ball mount like # 5201 so they can't just use your ball mount to take the locked trailer.
    view full answer...

  • Size of Hole Where Padlock Slips Through on Dutton Lainson Coupler Lock DL13980
  • The diameter of the hole on the Dutton Lainson Lock part # DL13980 that you referenced where a padlock would slip through is 7/8 of an inch. We recommend the Masterlock Padlock part # 37DAT for this lock.
    view full answer...

  • Keying Multiple Master Locks Alike
  • When you purchase 2 Master Locks part # 37DAT, you will incur a nominal fee per lock to have them keyed alike. You will select the keyed alike option and quantity of 2 and both will be keyed the same. I added a video review for you too.
    view full answer...

  • Diameter of Locking Portion of Tow Ready # TR63254 5th Wheel Base Rail Lock
  • The outer diameter of the locking portion of the Tow Ready # TR63254 lock is 1.142, or just a bit larger than 1-1/8 inch. If this will not provide enough clearance, you can use the Reese Pull Pin Lock Plates like part # RP58093. You would also need a padlock like part # 37DAT. Keep in mind that these Pull Pin Plates are not compatible with the Reese R16 or R20 due to the different sized pins used.
    view full answer...

  • Recommended 5th Wheel Hitch for 2016 Chevy Silverado 3500 8ft Bed w/Factory Below the Bed Rail Kit
  • Good news, I can help you pick out a 5th wheel for your 2016 Chevrolet Silverado 3500 8ft bed to transport your 2015 KZ Durango Gold 370RL. In my research I found that the GVWR of your Durango Gold is 14,500lbs, this is why I recommend the Curt 16K Dual Jaw 5th Wheel Hitch # C16520-16025. This heavy-duty fifth-wheel trailer hitch has a dual jaw and color-coded lock indicator for superb safety and security. It has a self-aligning, pivoting head and includes a lube plate to make hookup...
    view full answer...

  • Compatibility of Draw-Tite Hi-Rise Gooseneck-to-5th-Wheel Trailer Hitch Adapter 9480
  • The Draw-Tite Hi-Rise Gooseneck-to-5th-Wheel Trailer Hitch Adapter # 9480 will fit in your Draw-Tite gooseneck hitch. It also fits in Reese, B&W and Bulldog goose neck hitches. A compatibility issue does arise in short bed trucks and with trailers having a Sidewinder or Revolution pin box. As long as you do not have a Sidewinder pin box on the trailer you're good to go. If you care to add a lock you can use # 37DAT.
    view full answer...

  • Availability of Keyed Alike Padlocks and Trailer Coupler Lock Set
  • The Master Lock Trailer Hitch Receiver Lock and Coupler Lock Set - 1-1/4" and 2" Hitches # 3794DAT does not offer an option to be keyed alike to other kits or individual parts. The Master Lock Shrouded Padlock # 37DAT does have the option to key alike multiple padlocks, however there is not an option available to have them match the # 3794DAT lock set. Unfortunately for keyed alike locks, the padlocks are your only option for your slide in ramps that I can find.
    view full answer...

  • How to Order 2 of the Masterlock Shrouded Padlocks # 37DAT Keyed Alike
  • To get two of the Masterlock Shrouded Padlocks # 37DAT keyed alike all you would need to do is select the keyed alike option from the drop down menu and enter a quantity of 2 in the quantity box and we will ship you out two of these keyed alike!
    view full answer...


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Info for this part was:

Expert Research:
Patrick B
Expert Research:
Adam R
Updated by:
Laura H
Photos by:
Amber A
Photos by:
Zach O
Updated by:
Sarah W

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