bing tracking image
  1. Trailer Door Latch
  2. Polar Hardware
  3. Cam Door Latch
  4. Latches
  5. 36 Inch Long
  6. Lock Not Included
Cam-Action Lockable Door Latch w/ 36" Pipe for Enclosed Trailers - Zinc Plated Steel

Cam-Action Lockable Door Latch w/ 36" Pipe for Enclosed Trailers - Zinc Plated Steel

Item # 305736
lowest price pledge
Retail:$88.50
Our Price: $48.64
You Save: 45%
Trailer Door Latch
Orders above $99 qualify for Free Shipping
Shipping Weight: 7 lbs
Quantity: 
Trailer Door Latch 305736 - 36 Inch Long - Polar Hardware
zoom in icon
slider vertical 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

Need help with installation?
Locate installers near me
Cam-action door latch with pre-installed 1" diameter pipe is ideal for side doors that are smaller than rear doors on your trailer. Double-action handle protects against jarring while driving. Non-removable pin helps keep your cargo safe. Lowest Prices for the best trailer door latch from Polar Hardware. Cam-Action Lockable Door Latch w/ 36" Pipe for Enclosed Trailers - Zinc Plated Steel part number 305736 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (373)
  • Q & A (0)
  • Photos
  • Why etrailer?

Polar Hardware Trailer Door Latch - 305736

  • Cam Door Latch
  • Latches
  • 36 Inch Long
  • Lock Not Included
  • Polar Hardware

Cam-action door latch with pre-installed 1" diameter pipe is ideal for side doors that are smaller than rear doors on your trailer. Double-action handle protects against jarring while driving. Non-removable pin helps keep your cargo safe.


Features:

  • Cam-action door latch with pre-installed pipe is ideal for side or small rear doors on utility trailers, vans, and trucks
  • Bridge-type hasp helps prevent accidental opening and ensures safe latching action
    • Can be locked with padlock (sold separately)
  • Double-action handle assembly ensures simple, secure latching and helps protect against in-transit jarring
    • Flip the handle keeper on the hasp up and lift the handle
    • Rotate the handle to either release or engage the cams
  • Non-removable pin ensures maximum security to keep your cargo safe
    • Helps prevent tampering and removal of door
  • Reversible design allows the latch to be used on left-hand or right-hand doors
  • Zinc-plated steel construction is corrosion resistant
  • Black vinyl handle provides a smooth and comfortable grip
  • Simple bolt-on installation
    • Mounting hardware not included
  • Made in the USA


Specs:

  • Hasp dimensions: 5-1/8" tall x 2" wide x 1-3/4" thick
    • Distance between mounting holes (center to center): 4"
    • Mounting hole diameter: 3/8"
    • Lock hole diameter: 1/2"
  • Bracket dimensions: 4-1/2" tall x 4-1/8" wide
    • Distance between mounting holes (center to center): 3-1/4"
    • Mounting hole diameter: 3/8"
  • Handle length: 14"
  • Pipe dimensions: 36" long x 1" diameter


Product shown with lock (lock not included)

Product shown with lock (lock sold separately).



3057-36 Polar Hardware Side Door Bar Lock Assembly Weldment w/ 36" Pipe






Customer Reviews

Cam-Action Lockable Door Latch w/ 36" Pipe for Enclosed Trailers - Zinc Plated Steel - 305736

Average Customer Rating:  4.8 out of 5 stars   (373 Customer Reviews)

Cam-action door latch with pre-installed 1" diameter pipe is ideal for side doors that are smaller than rear doors on your trailer. Double-action handle protects against jarring while driving. Non-removable pin helps keep your cargo safe.

by:

Thanks for the follow up. We just bought a Look 6' x 12' cargo trailer that only had the in-door lock on the side door. Of course we wanted to beef that up and in searching found your site. After reading the reviews we ordered the #305736 36" side door bar lock assembly on 1/20 and received it 1/22. Great! We installed it the next day in about an hour. It went on with minimal effort (drilling the holes was the worst) and looks as if it came on the trailer. We did install the hinge side over the door trim and used backer plywood inside with oversized washers and locking washers. We did the same for the door bracket. The pictures on your site from customers helped us, so we have attached a couple of our own. Thanks e-trailer! The Wheelers


Comments
This product still works great and looks like new! We will go to you first if we have any other needs.
The W - 01/29/2015


by:

I just attached the 36" latch bar. it only took about 30 minutes. Took longer to make sure it was positioned right and not to impede on the rv latch. I included a small bracket on the door as well. Latch hardware seems better the originals on back. 5/16" carriage bolts are needed. I used 2 1/2" then cut off anything past the nut. Pictures included.


Comments
Michael,Im doing exactly what you did putting this bar lock over an RV style door. The door is about 12 from being flush with the trailer side and it looks like yours may be too. Did you bend the strap to get it to lay flat against the door? I thought of spacing out the hinge plates so theyre flush with the door but dont think that would look good.Also, did you remove the rear lip on the aluminum trim the hinge plates are mounted over, space under the hinge plates, or just mount over it?Thanks,Steve
-- comment by: Steve S - 12/09/2013
Comments
Steve,there is an aluminum trim around the rv door, I just bumped the hinge of the bar to the closest lip of that alum. trim to the door basically mounting over the top of the trim -so on top of the left side bump and bumped the right side if that makes sense. it kinda naturally fits. the bar lays nice and tight to the door by just mounting it ad is. Add some metal straps on iside of door mount to beef that up. I used 2 or 2.5 inch bolts with oversized washers on inside alum. jamb and cut off excess bolt and grindedsanded smooth to nut. I siliconed the gaps on the outside above hinge because it wont sit flat due to the alum. trim so water doeant get on by bolts. Hope that helps.
-- comment by: Michael - 12/27/2013

Thanks for coming back and following up!

-- Etrailer Expert Patrick B - 12/28/2013

Comments
Working great. Would order from you again.
Michael K - 10/24/2014
Comments
Is there a weak point created when bolting the hinges so close to the edge of the door opening? Could you install one of these by moving the whole assembly to the left, thus creating room for hinge backplates? I guess you would have to lower the mount point as well, to avoid the doors backplate from hitting the factory lock and use a shorter but wider door backplate.I assume you feel your hinges are secure. I have yet to take ownership of my trailer so I dont know what kind of stud is framing the door.I am so happy this accessory is available. I really didnt notice the pitiful side door lock until after I purchased my trailer. A crowbar and about 5 seconds is all it would take to get inside!
-- comment by: Scot S - 03/05/2015

Usually these latches are not positioned so closely to the edge of the door. Most of the time, the hinges of the handle side and the latch for the handle are set equidistant from the edges of their respective doors.

-- Etrailer Expert Patrick B - 3/9/2015


by:

Works good, plating is bad.



by:

We recieved our door-bar on Thursday Evening, and Friday I installed it in about an hour. I purchased $7.50 worth of carriage bolts & washers & ny-lock nut. 2.5 carriage bolt for the 36" rod hinge & 2" for the door. Our older Aluma trailer door lock with the "rod & lever" closure was not keeping the door completely closed plus the keys are obsolete and needed a new key.
With this set up my doors stay sealed to keep out dirt & dust and I can use any heavy duty lock. (Lock upgrade purchase soon) Thanks for fast delivery service too. Odered on Monday & recieved on Thursday!
Plus we love our 1.25 receiver hitch for our VW Jettawagen which we use to haul our bicycles! (purchased in October). We Paid $75 to have it professionally installed but saved $100 on the hitch.



by:

Good product. Only thing is mounting hole is 5/16 carriage bolt. Not 3/8. Can’t really complain.


Comments
Our product page says that the diameter of the mounting hole is 3 8ths. Most drill charts recommend using a 5 16th bolt for a 3 8ths mounting hole.
-- Etrailer Expert Sierra K - 05/06/2022

by:

Pretty nice product. Appears to be made in the USA by Polar. One of the welds is what I would call sub par, but the rest look OK. Easy install on my cargo trailer's side door. Takes 5/16" carriage bolts.



by:

Holds door securely shut. I added a custom bracket to stabilize the side of this homemade box, by using the back door as a shear wall. See special bracket just below top hinge, under rod. The right wall cannot vibrate when driving, or be pushed out by contents inside.



by:

Very pleased with the door latch. But extremely happy with etrailer for the speed of getting the door latch to me. We use this trailer every day.



by:

Great products, perfect replacements!



by:

E-trailer did an excellent job of shipping and handling of the product sent to me. It is of high quality and should last for years. It was delivered when they said it would be and I have installed it. Quite happy with it but wish that they would stock a 45" bar lock


Comments
The latch assembly is exactly what I needed for the shed that I built to house my small refrigerator. The critters or other unwanted cant get in.
Les S - 08/31/2016


by:

This door latch is holding up well in the West Virginia winter environment with all of the road salt. I would have given it five stars but we did have to use several stainless steel fender washers and linger bolts to space the latch portion out from the door about 3/8” to keep from having to cut the trim around the door opening. Other than that everything was good.



by:

The 36" LockSide Door was shipped fast and was just what I was looking for.
It was the correct size for my door and was easy to install. Took about and hour and fit . All I Had to do was get the hardware to install . Would buy this product again and would recommend.



by:

Adds extra security, which is why I bought it. The product is well made but the machining is a little rough. Aside from that, it's a good product and does the job of slowing the bad guys down by adding another layer to a potential robbery.



by:

Prompt shipment, Quality product, insufficient dimensional detail to determine the designed relationship between the hinge mounting surface plane and the door surface plane when door is in the closed position. Had to buy the product in order to determine the applicability. Was able to adapt after determining the required shim thickness.see attached pix.



by:

Product shipped quickly! Was at my door 3 days later. Took 45 mins to install by my self very easy! It helped reading reviews to insure it was installed right. I would definitely recommend a brace inside of door where latch is door was flimsy.



by:

Received in a timely fashion and exactly what we were looking for. Thank You!



by:

here is a pic of the trailer I built, used the products from your place. started with a simple
utility trailer, and build this enclosed trailer.


Comments
Ed- awesome build. Im building something very similar. Where did you get the trim for the door so it can seal? Also what about the larger top trim?
-- comment by: Ryan - 03/28/2016


by:

Excellent so far as I have not installed it yet
Will update when I do



by:

The Lock Side-Door Bar is what should be on the door. I security it gives me now hauling the trailer down the road is comforting knowing that it will no long swing open in its original state with just a key entry lock. My husband was happy with the simple install and it matches what I already have on the drop back door. Very happy with the product. Highly recommend it.


Comments
Awesome! Best purchase ever!
DonnaK - 03/27/2018


by:

My trailer didn't come with one so I was always worried about the side door coming open. Not anymore!! This item is perfect for what I needed, easy install too. A LOT cheaper price then expected! Arrived sooner then was told.


Comments
Loved your product! Easy to install, great price, and arrived earlier then expected! Piece of mind now going down the road. That side door is NOT coming open! Ill be back!
-- comment by: Greg - 06/11/2018

Comments
Perfect! No issues....its strong and smooth operation....and PEACE OF MIND my sidedoor will NOT come open driving 65 on the highway.
Greg - 05/22/2019


by:

Great quality and excellent customer se rvice!



by:

Great quality, didn’t come with the bolts to install, which was a bummer.



by:

Trailer I bought didn't have it and I wanted it. Only regret is you don't have mounting hard for it. I'll get it local.



by:

It worked great and was a simple insta llation



by:


My shed door didn't close well and
the shed was becoming a haven for wasps. After searching for a door latch that would seal the door I found your website and you had the perfect product for my project.

Your site was easy to navigate and simple to use. I was happy with the email updates on the shipping status and the latch arrived in good time and in good condition.

This might be the first time your trailer parts were used to fix a shed, so I'm including a picture.

All in all, a great experience.


25
373
Show More Reviews

Ask the Experts about this Polar Hardware Trailer Door Latch





< Previous



Do you have a question about this Trailer Door Latch?




  • Why etrailer.com?

    At etrailer.com we guarantee:
  • Highest quality trailer door latch 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 trailer door latch 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:

Employee Mike L
Expert Research:
Mike L
Employee Robert G
Expert Research:
Robert G
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee John H
Expert Research:
John H
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Dustin K
Video Edited:
Dustin K
Employee Adele M
Updated by:
Adele M
Employee Amanda M
Updated by:
Amanda M
Employee Mike S
Updated by:
Mike S
Employee Noah M
Updated by:
Noah M
Employee Cole B
Installed by:
Cole B
Employee Jacob H
Installed by:
Jacob H
Employee Zach D
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.