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Side-Door Bar Lock Assembly - 55" Long

Side-Door Bar Lock Assembly - 55" Long

Item # 3057-55
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Side-Door Bar Lock Assembly - 55" Long 55 Inch Long Pipe 3057-55
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Cam-door style lock is ideal for use on trailer side doors that may be smaller than rear doors. Features 55" long pipe and rust- and corrosion-resistant zinc coating. Lowest Prices for the best trailer door latch from Polar Hardware. Side-Door Bar Lock Assembly - 55" Long part number 3057-55 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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Polar Hardware Trailer Door Latch - 3057-55

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

Cam-door style lock is ideal for use on trailer side doors that may be smaller than rear doors. Features 55" long pipe and rust- and corrosion-resistant zinc coating.


Features:

  • Cam-door style lock is ideal for use on trailer side doors that may be smaller than rear doors
  • Rust- and corrosion-resistant zinc coating
  • Mounting hardware not included
  • Overall pipe length: 55"


Dimensions



3057-55 55" Long Side-Door Bar Lock Assembly





Video of Side-Door Bar Lock Assembly - 55" Long

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




Video Transcript for Polar Side-Door Bar Lock Assembly Review and Installation

Hi there, trailer owners. Today, we're going to be taking a look at Polar's side-door lock assembly. These are available in three different sizes. You can get it at 36, 45 or 55 inches long. And just like the name says, this is a locking door latch assembly. It is mostly used for the side for your smaller doors, but on some of your enclosed trailers, you may have similar styles like this at the back as well.

We just got done replacing one that was originally on this trailer that had rusted off and our nice new one is holding it nice and tight. We've got considerably more pressure. So our door's not vibrating around as much as it used to. We'll be replacing the one on the other side here as well. But we wanted to give you a comparison of how your old ones might look.And with this old style here, you can see it's all rusted up, squeaks a lot.

It's kind of difficult to move. And on the other side, well, that one, the handle came completely off. Our new one's going to be nice, smooth, and easy to operate, simply unlatch it. It also offered more pressure than our other one did, which keeps our door closed. Previously, when we had both latches shut before our handle broke off, this door would kind of rattle around.

It really didn't stay very well shut with even just the new one on the one side, it's significantly stronger and feels more secure and shut. It offers a steel construction. So it's going to be solid and durable and to prevent rust and corrosion like our old one's had. It has a zinc plating on it, which is going to keep all that moisture off and give us a nice finish over it that's going to last a long time and they're also a fairly standard size.When we replace this one, our bar here was able to line right back up with the existing holes. It doesn't come with hardware, so you will need to reuse your old hardware or purchase new hardware if you want it to be nice and shiny.

I do highly recommend carriage bolts if you are replacing the hardware so that way it has a nice button look appearance. And when you go to tighten down the nut on the other side, it's being held out here. It also comes with a new lock side for your handle. It's got a nice, smooth pivot and holes in both the top and bottom. So you can put a padlock through when you've got it all latched and closed so nobody can get inside. It's a pretty straightforward and simple installation.In most cases, you won't have to do any drilling, but sometimes you will if there's a slight difference on yours. We're going to go ahead and show you how to install it now. One of the things you might consider, if you've got a enclosed trailer that you want to keep out, any moisture and stuff, maybe like a side door on a toy hauler or something. You may want to put some silicone or seal it on the backside of this to keep out any moisture. So you can see why we're going to be replacing our old one here. Rust has got the better of it. We're going to go ahead and take our old assembly off here and put a whole new assembly on. It doesn't come with new hardware so we will be reusing our old bolts and they come as a quantity of one.So we're going to go ahead and get two of them and replace both sides. That way we'll have a matching look here at the back of our trailer. And we don't have to worry about this happening to the other side as well. We're now here on the inside of our trailer, where we can see our hardware here. On some of your trailers you may have a trim piece here that you need to remove. Ours doesn't have any kind of enclosure on it, covering it up. And we're just going to remove these carriage bolts. There's a nut on that we're going to take off on each one and we're going to use a 1/2 inch socket to do so.And then we can just slide it off of here. And it's not a bad idea just to clean up the area behind where your old ones were, we're just using a little bit of alcohol to clean it up, but you could use soap and water and a brush, just like you clean your car. We can now take our new one and put it in place. We want to make sure that the hinge here is on the outside and we're going to just take our carriage bolt, slide it through and then slide it through here. You want to make sure that you're using carriage bolts because you see the holes here are cut out in a square. That way you don't have to hold it while you're tightening it down. And just put a few turns on it, you don't need to go crazy. It's just going to make, installing the rest of our hardware a lot easier if we don't have to hold it up.From here, we can just install the rest of our bolts by lining up the holes again and reinstalling the hardware. We can then go back and tighten our bolts down. So we're just going to take these off on the backside. Ours are nuts that have Torx bit openings in them, and we're going to use a T55 Torx for ours, but yours could potentially be something else. Now, the assembly might get a little stuck in there, that's no big deal. We can just knock it through with our hammer and an easy way to ensure you don't damage the threads. Now I know this is an old one, so we're not going to be reusing it anyway. We can thread our nuts on there, and that usually is enough to help us tap it, just to kind of get it started.We can likely now just go to the other side and pull the assembly office. We've made a little gap between the door and the latch assembly. So now we can easily just kind of work it out. If you have a lot of rust and stuff on here, sometimes it's easier to use an abrasive pad to remove the material rather than some alcohol on a cloth. So now we've got our new latch assembly and I went ahead and checked it with our old one and unfortunately our bolt holes aren't going to line up on this one. So we are going to have to drill a new hole for our new latch. So an easy way to ensure that it's going to line up properly we're just going to put it on our bar, push it in place.And then we're going to try to use one of the old holes as a template if we can. Looks like it's going to line up pretty good with that bottom hole. So since it's going to line up with our bottom hole, just fine, we're going to go ahead and use that bottom hole. Then we'll just set this thing up straight after running it through and use the top hole as a template. So I've gone ahead and just slid the bolt in. I didn't tighten it down yet. We're just using it again as a template. So we're going to line this up right below our other hole. And then we're going to go ahead and make a little pilot mark.We can move our bracket out of the way, and then just finish drilling this out. We're using a 5/16 drill bit. Once you get your top field out, we're just going to put that back in place. You don't want to put your lock assembly on it and slide your carriage bolt through. And we're going to walk around to the other side, to install our nuts onto our bolts. Here on the other side, we're just going to start our nuts, trying to be careful not to push the hardware back through. And then we can just tighten them back down.Now that we've got it tightened down and installed, let's go make sure that it's going to work properly. We've got a good tension on our door it's going to hold it shut, and our latch works properly. And you might be wondering what we're going to do about this hole here. And you've got a couple of options. You could run a nut in a bolt through it, but it looks like that's going to interfere with our latch mechanism. So we're just going to be filling it up with some silicone. You can get black silicone here at etrailer.com if you think you're going to need some. And we're just going to seal that up. You can also fill in the inside if you want to ensure that you're completely sealed. And that completes our look at the Polar side-door bar lock assemblies.


Customer Reviews

Side-Door Bar Lock Assembly - 55" Long - 3057-55

Average Customer Rating:  4.9 out of 5 stars   (115 Customer Reviews)

Cam-door style lock is ideal for use on trailer side doors that may be smaller than rear doors. Features 55" long pipe and rust- and corrosion-resistant zinc coating.

- 3057-55
by:

Overall a good product. I installed it over an RV style door on my enclosed trailer. Cheap stamping of the latch itself and lack of quality control leaves me needing to dremel out the opening to correct the alignment of the hole so that a puck style lock can be used. A little disappointed here...



- 3057-55
by:

I purchased this enclosed trailer lock system to use on my tool storage shed after being broken into. This thing is great. It has secured my shed and the way it mounts, they'd have to tear the shed down in order to get into it. The parts arrived on time, they were complete and I've been using it for a year. I live in rainy country and there are no signs of rust or aging at all. Great part and great value.


Comments
I love this lock system. I put it on a tool shed to prevent theft. It’s tough and smooth and easy to use. I live in the Pacific Northwest and it is holding up remarkably to our wet weather. Not a spec of rust anywhere.
Steve H - 07/31/2020


- 3057-55
by:

Great quality, and a fair price. Shipping is always a detriment these days. Still, it's exactly what I've been needing to secure my instruments. Clearly Etrailer, is seeking repeat customers with there heads up on back orders, and follow up E-mail. Thanks, Bob L.



- 3057-55
by:

Product looks solid but is missing hard ware


Comments
I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 12/30/2021


- 3057-55
by:

The service we received was excellent. Our Bar Locks arrived much faster than expected and were exactly as described. They were installed easily and a perfect fit. The only problem is now the shiny new bars don't match the rest of the rusty trailer.



- 3057-55
by:

Product came very quickly. I had two barn doors on a dump trailer that I wanted more support for closing, so I used this instead of a clasp. There is pressure pushing out from inside, and this keeps it solidly closed. Also having the long handle gives a little more leverage to push up and allow it to open with the pressure against it. I would definitely recommend this product to someone looking for a longer, more secure door latch.



- 3057-55
by:

Fantastic hardware at an affordable price. Quality product. We have ordered 11 of these latches to weld onto a converted shipping container - turned storage units. We anticipate doing a bunch more orders of the same. Very friendly staff that is quick to respond. Shipping was quicker than anticipated.



- 3057-55
by:

it arrived damaged from poor packaging


Comments
I will have our customer service team reach out to you.
-- Etrailer Expert Jenny N - 12/14/2021


- 3057-55
by:

Changed a front dropdown hybrid camper tent door from screw clamps to these normal door latches for better sealing. Not quite as heavy metal as older latches, but adequate for task and thick enough to weld. Robot welding is beautiful, some spatter berries to remove. Plastic cover plugs on ends were distorted damaged and ugly so I tossed those. Overall good rpoduct and worked well for intended purpose. Good price for the quality received.


Comments
Replaced screw clamp latches on front of a fold out camper with these cam locks. Better seal and more secure. I had to cut and weld to get length I wanted but overall worked well. Still rust free. Needs some oil on hinges occasionally, as to be expected. Would buy again if needed.
Kevin j - 06/24/2018



- 3057-55
by:

Great to deal with, highly reccomend.



- 3057-55
by:

they are still working great and an excellent fit for my trailer



- 3057-55
by:

No issues with the product. I did however weld a piece of metal over the latch so thieves can't break it and gain entry, as well as rounded off bolts with a double nut on the interior. I also purchased a big box lock that goes with a solid pin. Without that it only takes a good pry to pop the latch and break in. etrailer has been great to do business with



- 3057-55
by:

Everything fit perfectly and worked as intended



- 3057-55
by:

Exact fit replacement which was easy to install. The detailed measurements provided on the etrailer web page made me confident that this would work without any modifications. Etrailer communicated shipping status which made the whole buying process seamless.



- 3057-55
by:

It was just as advertised. All parts were there. Everything fit fine. I would buy from etrailer again


Comments
Well, everything is still working fine. Thanks for checking
Dennis - 03/26/2019



- 3057-55
by:

This is a pretty simple part, easy to install, all the hardware was there and the right sizes. The most important part, t's a huge piece of mind to have the side door on my trailer barred! Good stuff.



- 3057-55
by:

I bought these for my Toy Holler Guy In Tomball Axi mission point customer service was excellent. Selection was excellent. I will always use etrailer in the future!



- 3057-55
by:

The detailed description and measurements that are included in the product description made finding this product easy and ensured that I was able to accurately measure my replacement needs. The correct product arrived on time, fit perfectly and was in fact superior to the OEM bar latches. I am a very satisfied customer.



- 3057-55
by:

It was delivered fast. It wasn’t an exact fit to replace my wore out broken bar locks, but a little drilling and tapping and nobody knows the difference. The ramp door on my trailer is now very secure.



- 3057-55
by:

This was also used on our custom landscape truck to keep ramp door shut.



- 3057-55
by:

Ordered this door lock assembly for our storage trailer. On-line purchase was easy, price was competitive and delivery was faster than expected. Although not yet installed, it appears robust and I am sure it will fit our needs.



- 3057-55
by:

The quality and the value of the product was great. I would have given a n excellent if the hinge holes had lined up with my existing holes. They were off by about 3/8 of an inch resulting in having to move the bar slightly to the right in order to drill new holes in the trailer. A measurement in your description that shows the distance from the top, lower hinge hole to the bottom, upper hinge hole would have prepared me for drilling new holes in the trailer and knowing the bar was going to have to be slightly crooked. Hope it holds up to the test. Thanks for rushing my order through...service was great!



- 3057-55
by:

On time when promised order complete top notch company thanks


Comments
Perfect fit bolted right on
Moe - 01/29/2019



- 3057-55
by:

Product was everything I expected it to be. However, I did not expect so much difficulty in locating the specialized nuts and bolts so I could make a "flush-on-the-inside" installation of the "lock side-door bar lock assembly". They are hard to come by.



- 3057-55
by:

Great product, strong but flexible enough to lock cargo door. Easy to install but comes without any hardware like screws.


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Show More Reviews

Ask the Experts about this Polar Hardware Trailer Door Latch



  • Does the Side-Door Bar Lock Assembly part # 3057-55 Come in a 65" Length
    The 55" Side-Door Bar Lock Assembly part # 3057-55 is the longest that I have available for this application. A possible solution for you would be to use the Bracket Assembly for Polar Economy Side Door Lock part # PLR3057-100 which would allow you to add your current length bar and handle to add to these and restore your factory set up. Since these are designed to hold the door shut it really doesn't matter if it is 65" or 55" as long as it holds the door shut. I do understand however...
    view full answer...
  • Availability of Floor Escape Hatch for Enclosed Cargo Trailer
    I can help you out with parts to create a hatch in the floor of your enclosed trailer, but we don't have an all-in-one kit for an escape hatch in your trailer. You'd need to make a cut out in the floor of your trailer and then you can use the Paneloc Butt Hinge # H418-204U to hold the door and the Trailer Rope Ring # RR02 as a handle. I also recommend using 1 or 2 of the RV Bolt Door Latch # 37220645 on the inside of the hatch to keep people from getting in from the outside. I'm attaching...
    view full answer...
    Image 1 for
  • Is Welding Required for the Handle on the Cam-Action Lockable Door Latch Kits
    I do have an option for you but the handles included with the Cam-Action Lockable Door Latch Kits like part # PLR658-SSP must be welded to the pole as there are no other options to attach them. If you can get away with a 55" long pipe then you can use the 55" Lock Side-Door Bar Lock Assembly part # 3057-55 which is already welded for you but best option would be to obtain the above and just run by a local muffler shop and have them tack the new handle on as I am sure they would not change...
    view full answer...
    Image 1 for
  • Recommended Bar Style Lock for Trailer Doors
    For your 56 inch Lock Side Bar Lock similar to # 3057-55 I recommend the Economy Side Door Lock - Stainless Steel # PLR3057-SS. This will allow you to customize your length using a 3/4 inch pipe which is not included. This style of lock normally doesn't need to be within an inch, so I also have attached another style of lock that may be what you are looking for. It is the Cam-Action Lockable Door Latch Kit w/ Narrow Hasp for Small Enclosed Trailers - Zinc-Plated Steel # 383200. This...
    view full answer...
    Image 1 for
  • Availability of 60 Inch Cam-Door Style Lock Kit
    The 55 Inch Lock Side-Door Bar Lock Assembly # 3057-55 referenced in your question is also available in a 36 inch size, with part # 305736, however there is not a 60 inch unit currently available. I instead recommend looking at the Polar Cam-Action Lockable Door Latch Kit # 383200. This steel cam-action door latch is a more universal design that does not include the 3/4 inch inner diameter pipe. This will allow you to use this kit with a pipe that features a length of your choice, as...
    view full answer...
  • Trailer Lock for Toy Hauler Door
    While we do not have any specific replacement parts we do have some options but you will need to replace the latch system (unfortunately the second picture you mentioned did not come through). For example, you may be able to use the 55" Lock Side-Door Bar Lock Assembly # 3057-55 or the Cam-Action Lockable Door Latch Kit # PLR158. I have added links to video reviews of these locks for you to take a look at as well as a link to our entire selection of locks so you can see if there is anything...
    view full answer...
    Image 1 for
  • Availability of Stainless Steel Trailer Side-Door Bar Lock Assembly
    The Polar 55-Inch Side-Door Bar Lock Assembly # 3057-55 features galvanized steel construction but they do offer a universal kit with stainless steel components, part # PLR158-SS. This kit does NOT include the 3/4-inch diameter pipe so that one part you will source locally. Since you provide the pipe you can control the exact size of the lock set-up to best fit your trailer door. Polar also offers a heavy-duty version # PLR258-002-SS which is designed for flush to 3/4-inch-offset doors....
    view full answer...
  • Alarms and Locks to Prevent Theft From Enclosed Cargo Trailer
    I am glad you were able to avoid a loss from your cargo trailer by using an alarm system. It sounds like you have (had) a cam style door lock like # 3057-55 and # 305736 on your cargo trailer's rear door. These can be locked with items such as Global Link Vise Lock # 295-000024. If a determined thief has the time and the tools, pretty much any lock can be defeated, but alarms along with multiple locks can make your trailer a less appealing target than another, and sometimes that is the...
    view full answer...
  • Replacement Cam Door Latch Handle for 2005 Jamco Horse Trailer
    I looked at many photos of 2005 Jamco horse trailers to see the type of door handles it has and it appears you could have the popular cam type rear door lock like # 3057-55 or a side door lock like # PLR3057. We do offer replacement handles for these locks and I linked our page that shows all of them, including parts # PLR158-100-SS, # 158-100 and # PLR158-100-A which all measure 14 x 1-1/4-inches. If these are not the type of item you need please send us a photo or two to help us get...
    view full answer...
  • Carriage Bolt Size Recommendation for Cam Door 3057-55
    You will want to use 5/16 inch carriage bolts and matching washers and nuts to install the # 3057-55 that you referenced. Your local hardware store would be where you would need to go to find them. You will want to pick bolts based on the thickness of your trailer wall.
    view full answer...
  • Does the 55 inch Door Lock Side-Door Bar Lock Assembly # 3057-55 Include Door Lock Plate
    Yes, the door lock plate that you see in the pictures for the part # 305736 is included with the 55 inch version of the lock part # 3057-55.
    view full answer...
  • Door Lock Assembly Recommendation for use with the Blaylock Lock BLDL-80
    The style of door latch that the BlayLock Door Lock # BLDL-80 is designed to work with is the cam door style of door like the part # 3057-55 which is 55 inches tall or the # 305736 which is 36 inches tall.
    view full answer...
  • Latch Recommendation for Rear of Circle J Horse Trailer
    Typically you see lock/latches like the part # 305736 installed at the rear of a horse trailer. The assembly of this is 36 inches long. For a 55 inch long version the part # 3057-55 would work. My parents had several horse trailers and every single one of them used this style. I pulled up several pictures of 1997 Circle J horse trailers and they all looked like they were using a shorter latch like the # 305736. If you need a different style feel free to email me back with pictures of...
    view full answer...
  • How to Prevent Yourself from Getting Locked in a Trailer that has a Cam-Door Lock
    You would just need to lock the latch shut after you opened the trailer. That way the only way someone could close the door and lock it would be to first unlock the latch. Most likely you were planning on using a padlock to lock the door closed like the part # 131D, so when the door is open you would just need to put the padlock back on the latch and you would prevent the latch from getting shut while you are in the trailer.
    view full answer...
  • Replacement Side Door Latch Recommendation for 2007 Heartland Cyclone Toy Hauler
    The 55" Lock Side-Door Bar Lock Assembly # 3057-55 that you referenced is a very commonly used latch style for toy haulers like what you have. It's hard to say without seeing, but this would fit and work well to hold the ramp flush to the door frame.
    view full answer...
  • Mounting Hole Dimensions for the 55" Lock Side-Door Bar Lock Assembly # 3057-55
    I went and pulled a 55" Lock Side-Door Bar Lock Assembly # 3057-55 from our warehouse to get the dimensions you requested. The length from the top mounting hole of it down to the bottom mounting hole is 53-1/2 inches, the distance between the holes of the mounting brackets is 3-1/4 inches, and the distance from the center of the handle to the top mounting hole is 26-3/4 inches.
    view full answer...
    Image 1 for Image 2 for
  • Trailer Cam Door Handle that Uses Heavier Pipe than Stock System
    I actually have a better solution for you than using # 3057-55. You could instead use # PLR458-018 and then supply your own pipe. That way you can get as heavy as a pipe that the system will allow. Or a solid bar for that matter. The pipes on the pre-fab systems such as # 3057-55 are going to be the same as what you have now. On # 3057-55 the bolt holes at the hinges are spaced 3-1/4 inches apart on center. And the distance from the bottom hole on the bottom hinge to the top hole on the...
    view full answer...
  • Replacement Rear Cam Door Lock Recommendation for a 2012 Voltage 3900
    If you have a bar style door like the part # 3057-55 that you referenced on your trailer you could pretty easily replace it with the # 3057-55. The hinges may match up but we don't know that for sure. You can check out the picture I attached that has all of the dimensions of the lock for you to check out as well. If you wanted to provide your own pipe so that the lock you get matches the same length as what you have you could use the part # 383200 instead. You would need a pipe with a...
    view full answer...
    Image 1 for
  • Availability of a Door Handle for a 2007 Circle J Horse Trailer
    Yes, we currently offer a couple door handles that could would work with your 2007 Circle J horse trailer. If you are looking for a rear door handle, the Redline lock bar assembly # 305736. It's has a 36 inch long pipe. Or the Redline # 3057-55. It will have a 55 inch long pipe. If you are looking for side door locks, the Redline locking steel flush door latch # L3980 is easy to install and has a rustproof finish. This handle will work on doors up to 1-1/16 inches thick and can be locked...
    view full answer...
  • Side Door Lock Assembly for 2012 Hurricane Enclosed Cargo Carrier
    For your 2012 Hurricane enclosed cargo carrier, I recommend taking a look at the Polar 36 Inch Lock Side-Door Bar Lock Assembly # 305736. This cam-door style lock is great for use on trailer side doors and features a 36 inch long pipe with a rust-resistant zinc coating. We also have this assembly with a 55 inch bar with part # 3057-55 if a longer bar is needed. I have attached a short demonstration video on this kit so you can see exactly what all is included.
    view full answer...
  • Recommendation for Making a 45 Inch Cam Door Latch
    I have a solution for you, but it will require you to supply your own 45 inch long 3/4 inch inside diameter pipe. You will want to get the Universal Cam-Door Lock for Enclosed Trailers # 383200. Some welding is required for installation of this kit. I would use regular steel because it is easier to weld then galvanized materials.
    view full answer...
  • Is There a Solid Steel Bar Connection to Cam Holder for 10K Dump Trailer Available?
    It sounds like you are describing the 55" Lock Side-Door Bar Lock Assembly # 3057-55 or the 36" # 305736. These both have the pipe versus the solid steel round bar, so you may want the Economy Side Door Lock - Stainless Steel # PLR3057-SS where you supply the solid round bar to attach to the hardware.
    view full answer...
  • Availability of Trailer Side-Door Bar Lock Assembly Like # 305736 in Lengths Other Than 36-Inches
    The Redline 36-Inch Lock Side-Door Bar Lock Assembly # 305736 that you referenced is one of two sizes offered by Redline. The other size is a 55-inch version that is being added to our website now; that part number will be # 3057-55 and this will be available for order on our site in a day or two. We also offer their Universal Cam-Door Lock for Enclosed Trailers # 383200 that does not include the required 3/4-inch inner diameter pipe. You can use this kit with a pipe length of your choice...
    view full answer...
  • Mounting Bracket Width of the 55" Lock Side-Door Bar Lock Assembly # 3057-55
    I went and measured the mounting bracket of the 55" Lock Side-Door Bar Lock Assembly # 3057-55 that you referenced and found that the actual bracket is 1-1/4 inches wide, but if you count the hinge portion that sits a bit above bracket the overall width is 2 inches.
    view full answer...
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