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Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K

Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K

Item # 3370091410H
Our Price: $270.42
You Save: $181.65
Trailer Jack
Shipping Weight: 64 lbs
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Great Prices for the best trailer jack from Buyers Products. Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K part number 3370091410H can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (59)
  • Q & A (0)
  • Videos (1)
  • Photos

Buyers Products Trailer Jack - 3370091410H

  • Car Hauler
  • Enclosed Trailer
  • Fifth Wheel Trailer
  • Gooseneck Trailer
  • Utility Trailer
  • 10001 lbs or More
  • Sidewind Jack
  • Weld-On
  • Leveling Jacks
  • Tongue Jacks
  • 27 Inch Lift
  • With Rectangle Foot
  • Carbon Steel
  • Buyers Products

The Side-Pin Heavy Duty Square Jack from Buyers Products features a spring-return drop leg that allows easier expanding and retracting. The spring return is activated by pulling a sturdy side-mounted pin to drop the leg. Ideal for RVs, construction trailers and triaxle trailers, each jack has a 10,000 lb (dynamic) and 12,000 lb (static) capacity. The 4" square tube features a weather-resistant black powder coated finish, and includes a footpad.

  • Easy retraction and expansion with the spring return mechanism
  • Strong, durable 4" square construction will handle up to 10,000 lbs (dynamic) and 12,000 lbs (static)
  • Corrosion-resistant black powder coated finish
  • Handle included
  • Carbon steel construction

Note: If using dual jacks, use the front pin style of this product.

0091410H Buyers Products 12 Inch Heavy-Duty Side Pin 4 Inch Square Jack with Handle

California residents: click here

Video of Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K

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

Video Transcript for Buyers Products Trailer Jack - Side Frame Mount Jack - 3370091410H Review

Speaker 1: Today we're taking a look at a Heavy Duty Four-Inch Square Jack with the side-pin drop leg. Now the side-pin heavy duty square jack features a spring return drop leg that allows easier expanding and retracting. So the spring return is activated by pulling this sturdy side mounted pin to drop or extend the leg. It's a really nice design. It's also how you retract it, so when you're ready to retract it, you pull this, and the leg will go back up into the outer tubes here. Keep your hands clear when you do that, because it is spring return, so that will engage very, very quickly.Now this type of jack is ideal for RV's, construction trailers and tri-axle trailers.

This jack has a 10,000 pound dynamic, and 12,000 pound static capacity. The four inch square tube features a weather resistant black powder coated finish, and it includes the foot pad here at the base. Now the foot pads really help distribute weight, so they help spread out weight, which is really helpful, especially on softer surfaces. So if you're working on sand, gravel, grass, soil, anything like that, the foot plates come in handy, so it's a nice design. It's welded on to the bottom of this most inner tube right here.The unit's made from steel.

Again, it features that durable powder coated finish on it to resist rust and corrosion. The foot pad measures eight inches by eight and a half inches. We're looking at carbon steel construction. It does come with the handle, so this handle allows you to easily operate the jack. I just have the hardware loosely installed, so you would definitely want to tighten that down for your application, but I just have it it in there to show that the handle's included.

The attachment hardware is included, and the weld-on handle bracket, that's included as well. That holds your handle safely out of the way when the jack's not being used.You'll notice that right here we have two grease zerks. These allow for easy maintenance, so you can attach a grease gun to these, pump in the grease and it keeps those internal components lubricated as needed. I'm just going to spin it around here, show you that there's really nothing special about this side of the jack. Really simple design.Now a few measurements I want to go over with you real quick.

Retracted it measures around 28 inches from top to bottom, so if this is in the fully retracted position from bottom to top, measures around 28 inches. Extended, but not with the drop leg extended, so just using the handle to full extend, that increases the bottom to top measurement to about 40 and a half inches, which gives us a jack travel of 12 and a half inches, and then the drop leg, located right here, it has actually five adjustment holes. I just had one in the third one, but it has five adjustment holes, which offers an additional 13 and a half inches of travel. So the five adjustment holes are separated on center by three and three-eighths inches. That's going to be your incremental height adjustment when using the drop leg, so the total amount of travel possible with this jack is 26 inches.That's going to do it for today's look at the Heavy Duty Four-Inch Square Jack with the side-pin drop leg.

Customer Satisfaction Score:

Customer Reviews

Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K - 3370091410H

Average Customer Rating:  4.5 out of 5 stars   (59 Customer Reviews)


The product is great but arrived in packaging that did not properly protect the jack. The box was torn and the jack itself had some deep scratches and missing paint

Etrailer Expert

Katrina B.


You can use a rust-oleum type of paint to cover those scratches in order to prevent corrosion. I have a link below for your reference.


Super quick shipping and exactly what we needed for our Big Tex dump trailer.


When I purchased this leg I planned on replacing them as a set. I could not find the same leg that was reversed for the passenger side. Although the legs work perfectly and I love the retractable spring action. You will definitely need to know how to weld, flip the gear inside and have a drill and tap for new grease fitting location. I installed them so the release pins were on the outside.


Heavy Duty trailer Jack works and functions as described. etrailer was quick to get it out. Seems well made and should last many years.


The jack installed easily onto my trailer, and it has no problem lifting the trailer when fully loaded. No complaints.


It work! Price was competitive and it arrived pretty quickly.


Was very good value for the money. Used on my trailer that carries a 8k pound excavator. There was not a lot of grease in the top, so I opened the lid and put a BUNCH more in. I expect this to last a very long time.

Two recommendations if you need a new trailer tongue jack:
1) My trailer had a 5k lb jack on it before, which was technically enough because it only had maybe 2500lbs tongue weight... but it was absolutely a nightmare to use because of the weight and felt flimsy, go bigger, you wont regret it.
2) I made a huge mistake of not attaching to my truck and lowering the tailgate to make sure I could make a sharp turn with the tailgate down, that mistake cost me an $800 tailgate when I got busy and tried to move my truck really quick.


i recently purchased a heavy, very heavy duty jack from etrailer #3370091410h. have not installed as of yet but i'm sure i'm going to be very pleased . very well built. solid construction. two grease zerks at the gear points and pivots. after i install my jack and use it for a while i will update my review. quick shipping. it came quicker than i expected. my only concern is that its poorly packed do to the weight of the jack. the box had been ripped open several times and taped back up (ups?) i still give it a 5 star rating for jack quaility and etrailers quality service


Very good product


Very good, good price


I received my order soon after ordering. I have installed the jack on my stock trailer and am very pleased with it. My old jack had definitely see better days and was getting very hard to crank, etc.


Received your trailer jack it’s a Weld on tape and being Friday Labor Day weekend won’t get it welded in till probably Tuesday or Wednesday but I will keep in touch thank you so much for the prompt service




Great product for an affordable price!


Great product and great service. If you need trailer parts, go to etrailer. They are an excellent company and I will always use them.


Installed on a 30' enclosed trailer for my Broncos. Worked great!


Excellent service and fast shipping


I bought 2, they seems to be heavy duty, nice wide base, I'm putting them on a triple axle trailer. Thanks for the fast delivery


Was very happy with the item, was well built and strong. I delivery was on time and the phone order was pleasant . I am very happy with and will consider other items in the future.


Just what I was looking for. Always get good service, good prices and fast shipping!


Installed the jack today, customer was extremely satisfied. Couldn't believe how fast it shipped!



Great!!! No complaints from the customer.


The website was easy to navigate and find what we needed.
The shop cart was easy to finish the order
Shipping sent the order right away
We received the order before expected


Friendly professional staff
Fair price
Good product


Great service. Fast shipping.


Got everything I ordered very

Show More Reviews

See what our Experts say about this Buyers Products Trailer Jack

  • How Much Does the Buyers Products Heavy Duty 4" Square Jack Weigh
    The entire weight of the Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg # 3370091410H is 64 lbs.
    view full answer...
  • Dimensions of Buyers Products Heavy-Duty Square Jack
    I have a number of dimensions for you of the Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K # 3370091410H. It has a 4" square tube, an 8" x 8-1/2" foot pad, is 28" tall when it is retracted and 40-1/2" when it is extended. That means it has a total of 12-1/2" of travel. I have added a link to a video review of this jack for you to check out as well.
    view full answer...
  • Can Buyers Product Jack 3370091410H Only Be Used On Trailer Weighing Up To 12,000lbs?
    The 12,000lb static capacity of the Buyers Products # 3370091410H is the capacity of the jack itself, not of the total weight of the trailer, so you could use it on a trailer that has an overall weight of much higher than 12,000lbs.
    view full answer...
  • Is Replacing Gears of Buyers Products Heavy-Duty 4" Square Jack # 3370091410H Common
    In general the Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg # 3370091410H does not have a reputation for wearing out the gears or them failing over time. I'd be shocked if you had an issue with them. Especially in a situation like yours where you said it would be overkill for the application. That said I am sure we could help you get replacement gears if needed but at this time we do not carry them.
    view full answer...
  • Recommended Replacement Jack for Exiss Horse Trailer
    I might have an option for you but I don't know what exact jack you have on your Exiss Horse Trailer. That said, they are usually welded so there's not really a bolt-on replacement. The Buyers Products Heavy-Duty 4" Square Jack part # 3370091415H is a good option to start with, it has a 12,000 lb capacity and features a weld-on install. I have attached a full list of our jacks below as well if this won't work.
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  • Higher Capacity Trailer Jack that Can Fit 2022 Big Tex 14LD
    I looked up your 2022 Big Tex 14LD and it looks like it has an a-frame style trailer jack so for a higher capacity option that would fit we have the Bulldog part # BD155032 which has a 5,000 lb lifting capacity. In this style of jack we do not have anything with a lifting capacity of 12k. Also worth noting is that these jacks only need to have lifting capacity for the tongue weight of the trailer and not the entire weight so a 5,000 lb capacity should easily work for you.
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  • Recommended HD 12000lb Sidewind Square Jack With At Least 24" Lift
    I have a different option, but the closest option we have in a sidewind jack with a 12000lb capacity is the Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg # 3370091410H which has 26" of lift. This is a little more than you were looking for but will still work. I included a video of the # 3370091410H for you to take a look at.
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  • Is There Replacement Nut For 1991-1993 12,000 lb Bulldog Jack
    I checked with Bulldog and there isn't a replacement nut alone for your 12,000 lb Bulldog jack built between 1991 and 1993. I'd love to give you an easy solution here but there isn't an option available to fix your jack, so the best we can do is a replacement jack. Depending on what you need you can go with something like the Buyers Products Heavy Duty 4" Square Jack # 3370091410H. I know it's not the solution you were looking for but it is the only option due to the nut not being available,...
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  • Replacement Drop Leg 12K Jacks for a 2016 14k PJ Trailer
    We do not offer replacement inner tubes for jacks of that capacity. If you are unable to keep the drop leg from staying up you will need to replace the jack. We have a couple options. The Buyers Products Heavy-Duty 4" Square Jack w/ Side Pin Drop Leg - Sidewind - 26" Lift - 12K item # 3370091410H you were looking at would be a great choice. The Square Direct Weld Jack - Drop Leg w/ Spring Return - Sidewind - 28-3/4" Lift - 12K item # TJD-15000SP-F is another jack that is capable of supporting...
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  • Replacement Caster Wheel Jack for 2 Horse Slant Trailer
    If your horse trailer's jack has a caster wheel it is probably a bolt-on tongue jack like Bulldog # BD165412 or # BD165411 rather than a weld-on jack like # 3370091410H. These two Bulldog jacks are both rated for 1200-lbs of trailer tongue weight (appropriate for your 7K trailer) and both have a steel wheel; the only difference is the amount of lift which is 16-inches with # BD165411 and 19-inches with # BD165412. Both use a 3-bolt mount as shown in the photo.
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    Image 1 for
  • Replacement Trailer Jack For Rice Trailer That Currently Has Ram 14K Jacks
    The Ram 14K jacks don't have a replacement rod and nut available like the 12K # TJD-12000-RODNUT and are no longer available in that capacity. I recommend changing out your jacks for the 12K option. You can use the Bulldog Side Wind Jack Assembly - 12,500 lbs # BD182700 or the Buyers Products # 3370091410H or # 3370091415H as a replacement. These are all excellent products for the price to help your trailer function as intended.
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Do you have a question about this Trailer Jack?

Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Cole B
Installed by:
Cole B
Employee Kristina F
Written by:
Kristina F

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