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  1. Trailer Door Holders
  2. Polar Hardware
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  4. 4 Inch Hook
  5. Steel
  6. T-Style Hook
T-Style Hook and Keeper Door Holder for Trailer Rear or Side Door - 4" Hook - Zinc Plated

T-Style Hook and Keeper Door Holder for Trailer Rear or Side Door - 4" Hook - Zinc Plated

Item # 383400
Our Price: $12.73
You Save: 6%
Trailer Door Holders
Shipping Weight: 0.32 lbs
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Use this low-profile hook-and-keeper door holder to keep your trailer door open while you're loading and unloading. Zinc-plated steel construction resists corrosion and lasts longer than plastic holders. Mounting screws not included. Great Prices for the best trailer door holders from Polar Hardware. T-Style Hook and Keeper Door Holder for Trailer Rear or Side Door - 4" Hook - Zinc Plated part number 383400 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (332)
  • Q & A (0)
  • Photos

Polar Hardware Trailer Door Holders - 383400

  • Hook and Keeper
  • 4 Inch Hook
  • Steel
  • T-Style Hook
  • 2-5/16 x 1 Inch Hole Spacing
  • Polar Hardware

Use this low-profile hook-and-keeper door holder to keep your trailer door open while you're loading and unloading. Zinc-plated steel construction resists corrosion and lasts longer than plastic holders. Mounting screws not included.


  • Hook-and-keeper door holder keeps your rear or side trailer door open while you're loading and unloading
    • No need to get a friend to hold the door or find something to prop the door open
  • T-style hook fits securely into the receiver slot to hold the door in place
  • Foldaway hook provides a clean look and won't get in the way
  • Zinc-plated steel plunger is corrosion resistant
    • Lasts longer than plastic and standard steel holders
  • Hook mounts to the door; keeper mounts to the side of your trailer
    • Mounting hardware not included


  • Hook length: 4"
  • Hook mounting bracket dimensions: 3" tall x 1-3/4" wide x 3/8" thick
  • Keeper mounting bracket dimensions: 3" tall x 1-3/4" wide x 11/16" thick
  • Distance between mounting holes (center to center) on both brackets: 2-5/16" horizontally; 1" vertically
  • Mounting hole diameter: 3/16"

00009 Enclosed Trailer Door Hook and Keeper - Zinc

Customer Reviews

T-Style Hook and Keeper Door Holder for Trailer Rear or Side Door - 4" Hook - Zinc Plated - 383400

Average Customer Rating:  4.8 out of 5 stars   (332 Customer Reviews)

Use this low-profile hook-and-keeper door holder to keep your trailer door open while you're loading and unloading. Zinc-plated steel construction resists corrosion and lasts longer than plastic holders. Mounting screws not included.


The initial part I received was broken. I sent an email expressing concern and just received a generic response. It appears that my 1st email went to the wrong address. I received a follow up email and etrailer sent a replacement with no questions asked.
I replaced an existing door keeper and this one matched the holes perfectly. I don't know if it is alignment or the angle of the door but sometimes the hook does not want to drop right into the keeper.
The part works and I did get great support from etrailer once I got to the right person.


item was a perfect replacement for the original plastic one on my horse trailer.


Excellent product. Quick delivery. Outstanding tracking site. I have a V-nose trailer so I had to do a simple modification to the hook in order to mount the latch to the trailer. Rivets were used to secure the hardware to the trailer. Excellent product and service.


Holds door open during loading. Just what I wanted. Extra bonus, the moving part of the latch is spring loaded wo it stays flat when not in use and it does not rattle, or get in the way.


Perfect fit to replace my rusted 12 year old door hold. I had to bend the arm to match the bend in my OEM parts.


The service was great, quick shipping and good communication. The hook and keeper are exactly what I was looking for.


It was exactly the part I needed for my trailer. I didn’t need to drill new holes It fit perfectly. It was delivered in a timely fashion. Thanks etrailer. You are my go to every time.


Received the trailer door hooks & keepers. Everything went on without a hitch. My entrance door and escape door will now stay open. The latches are built well and should last a long time. I placed clear stone guard under the hook so it will not mark the trailer sides while traveling down the road.

Bob S.


They work great. Have not had any problems.


Great product. Great company...used it to hold outswinging shed door to 2x2 great !!!

Wayne W.


After a year, its holding up perfect...totally negates the disadvantages of a outswinging door....


Purchased as a replacement part. Very pleased with the quick delivery. Back in business


Used product on cargo side door used 3M tape to attached bracket with arm to trailer, the other to very well.

Bill K.


there is nothing to go wrong with bracket,,,love it


These door latches are much more substantial than the cheap plastic variety that came as standard equipment on my Utility Trailer.



Now that a year has passed, the latches are holding-up just as good as the first day I installed them.


Exact replacement, works well.


Good and sturdy as I was hoping it would be. I painted it white to match siding on trailer where I installed it to make it more appealing. It replaced a plastic OEM type that cracked too easily. Yep it did what I wanted it to do.



still doing its job.


This door stop really does the trick, good heavy duty metal construction. Replaces the cheap plastic one that was on the trailer in the first place. Would buy from again!

Rick J.


Great! Holds strong, very durable


Bought this to replace the original one that fell apart on my 24' Haulmark car hauler. This one is better built and has a little bit larger mounting bracket on the arm mount side, which also allowed me to anchor it better. The receiver end of my old one was still mounted on the door so I reused that part. Don't think this one will fall apart anytime soon.


I was looking for a product to keep the side door open, while I am loading-unloading my enclosed trailer. It perfectly meets my need on a very reasonable price. The only additional work I had with it to make it fit perfectly was to bend the latch , so it moves easily in the lock. I can definitely recommend this product.


Works like it should.


Replaced the flimsy and weak door holder with the Trailer Door Hook & Keeper # 383400. It works great in any kind of wind. The same type of latch came standard on another trailer I own and the only difference was a spring that keeps the latch from bouncing when not in use. Very good price and easy to install with pop rivets.


I bought two double wheel covers and they went right on without a fight.
I bought a couple of baggage door catches as the old were sun beaten and cracked. they went on using the same screw holes, perfect match. I bought a steel version of the old plastic hook and keeper door catch, which the sun had rotted. the bolt holes lined up tighter then the old holes which were stripped. The screws are not stripped now. I bought the Camco cam lock to replace the missing one on my heater door. It works like brand new. I haven't mounted the door lock yet.


I put this door hook and keeper on my horse trailer that has one heavy rear door in hopes that it would hold it open in the breezy conditions here. Unfortunately, the first time I tried it out, the wind took the trailer door and blew it completely open, crushing the keeper. I tried to pry it out with a screwdriver but it's pretty much unusable. It would probably work with a lighter, smaller door.


This is my first time ordering parts from online and I must say this was a great experience. I have had issues getting parts from other businesses in the past when picking up parts in person. So to have this run so smoothly is quite nice. The site was easy to navigate even for someone that is still new to computers. Everything is very well described and has photo's of the parts if there is a question. The cost for both parts I ordered were very nice I thought and then to top it off they showed up right on time like they claimed they would. The quality of the parts is top of the line and after this experience I can say for sure I will be coming back for any of the parts I need in the future. Thank you very much

Chris G.


the parts I ordered are still holding up and in working order. Very pleased with service and purchase still. i just havent had anything else brake lately to replace.


Fit perfectly made very well with thick steel


I just finished installing the door latches I purchased. They were installed on a 1976 Fairmont MT-19 railroad motorcar. The rear side panels of the cab were originally bolted to the frame making them stationary. This made the cab pretty cramped and on hot days, provided limit air circulation. I remounted the panel on a long piano hinge to allow the panels to be opened like a door and swung back towards the rear of the cab. The latches are used to hold the panels open in nice weather.
The latches work beautifully and look much more professional than using bungee cords to hold the "doors" open. I have some of your spring bolts on order that will be used for locking to panels in the closed position. Thank you!


Ordered 2 replacement ramp door latches and side door retainer bracket, very pleased in the packing and promptness of delivery. Installed the latches today fit perfectly. Thanks guys will definitely use your products again.

Show More Reviews

See what our Experts say about this Polar Hardware Trailer Door Holders

  • Trailer Door Hook and Keeper are Not Lined Up Properly on a Outback Enclosed Trailer
    So when you open the door and swing the hook part out to meet the keeper the door hits the fender before the 2 can reach each other? If that is the case then I would agree that somewhere along the line a mistake was made. The only hook and keeper we have is # 383400 and the hook is just 4 inches long. The best solution is to move the hook and/or keeper. It sounds like the screws used are Torx style or something similar. A hardware store should have the appropriate tool to remove and reinstall...
    view full answer...
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  • Why Doesn't Enclosed Trailer Door Hook and Keeper # 383400 Come with Install Screws
    The Enclosed Trailer Door Hook and Keeper # 383400 does not come with new screws because different applications will require different fastener styles and lengths. So instead of giving screws that would end up getting misused in some applications they let the customer decide what would be the correct install hardware to use. I attached an install video for you to check out as well.
    view full answer...
  • Bolt Hole Pattern of Polar Hook and Keeper for Enclosed Trailer Door 383400
    They are indeed. Vertically, the holes of the # 383400 hook and keeper are 1 inch apart and 2-5/16" apart horizontally as shown in the photo I've edited for you. If you click the provided link, you can see an installation video.
    view full answer...
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  • What Position Should the Hook and Keeper for Enclosed Trailer Doors Be Mounted In
    Correct, the mounting holes on the Hook and Keeper for Enclosed Trailer Doors part # 383400 are 2-5/16" apart top to bottom (vertically) and 1" apart left to right (horizontally). The actual plate measures to be 3" tall x 1-3/4" wide. Therefore, it is taller than it is wider. I have attached a few photos to clarify the above.
    view full answer...
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  • Installing Trailer Door Hook and Keeper # 383400
    You will usually see the hook portion mounted on the trailer door, with the keeper connected to the side of the trailer, but there is no reason why you could not install it the other way, if you wish. Just to be certain, I checked with the manufacturer who told me the same thing.
    view full answer...
  • Bolt Hole Dimensions for the Enclosed Trailer Door Hook and Keeper # 383400
    I attached a picture that has all of the mounting hole dimensions for the Enclosed Trailer Door Hook and Keeper # 383400 that you referenced. You would need to compare them to what your trailer has to see if it would bolt right up.
    view full answer...
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  • Will Enclosed Trailer Door Hook and Keeper 383400 Work on a Heavy Horse Trailer Door
    Even though the door on your horse trailer is heavy the door keeper # 383400 will still hold it open. Nearly all of the door's weight will be on the hinges and the keeper is just preventing it from closing. The keeper is not really supporting any weight so it will work well for you. I have linked a video showing an example installation.
    view full answer...
  • Hook and Keeper on Side Door of Haulmark Trailer
    The Zinc Plated Hook and Keeper # 383400 is a universal fit so it will likely work on your Haulmark trailer. It's a 4 inch hook with mounting holes that are spaced 2-5/16 inches horizontally and 1 inch vertically.
    view full answer...
  • What are the Dimensions of the Enclosed Trailer Door Hook and Keeper # 383400
    I went out to the warehouse and pulled Enclosed Trailer Door Hook and Keeper # 383400 to measure it. First, the mounting holes are 2-5/16 inches across on center and 1 inch top to bottom on center. The mounting plates for both pieces are 3 inches by 1-3/4 inches. From the center of the hook piece to the end of the hook is 4 inches. The hook piece sticks up 1/2 inch from the mounting surface. The keeper piece sticks up 3/4 inches from the mounting surface. I have also included a picutre...
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  • Can a Horse Trailer Back Door be Left Open or Will it Damage the Hinges
    It really depends on how heavy the door is, how far it sticks out from the hinges, and how big the hinges are. You could technically say the same thing about any door that mounts on hinges. So the doors in your house you would not necessarily be closed all the time. But at the same time the distance between the ground and the bottom of the trailer door is greater than that on a door in your house. In other words, a sagging door in a house would only go so far before being held up by the...
    view full answer...
  • Replacement Latch Part for 1994 Fleetwood Bounder Motorhome
    RV makers do not maintain any specs on smaller items like door hardware they install on their motorhomes so we have no way to look that up for you. Since I don't know which particular type of latch you need to find a replacement part you can use the linked pages that display the various door parts we offer, such as Hook and Keeper # 383400. If you like you can email me your photos of the door/compartment for which you need the latch part and I will be glad to help you find the right item.
    view full answer...
  • Holding Trailer Doors Open Using Plungers or Hook and Keeper Holders
    Regarding the man door and the awning, is there any way that you can attach the plunger style holder, # DH605, to the support are for the awning that is causing the interference? Otherwise, you could use something like the hook and keeper, # 383400. If they were placed near the door hinges you could probably configure it to hold the door open where it will not interfere or shut. The same thing for the rear barn doors. The stress on the door keepers would be greater the closer they are...
    view full answer...
  • Recommended Strap Hinges For 4 x 8 Foot Doors for Enclosed Trailer
    What you're planning sounds like it would work, but you'll need to be sure you have some cross members in the door where each hinge mounts. Since the doors are large and are likely pretty heavy, I'd use the biggest hinges you can. If you were wanting the hinge to swing all the way up against the side of the trailer, I'd recommend using # 2212. A hook and keeper, part # 383400 would hold the door open for you as you load/unload. If you only need the door to swing 180 degrees, use # 2512....
    view full answer...
  • Hook and Keeper for Haulmark Trailer with Longer Hook
    The longest hook and keeper setup we have for trailer doors is the part # PLR9-SS which has a 4 inch hook. Most standard sized hooks are 4 inches so this would be longer.
    view full answer...
  • Replacement Vent Cover with Continuous Hinge for 2018 Puma
    Since you have a continuous metal hinge for your 2018 Puma bathroom vent cover we have exactly what you need with part # BV0554-03. I'm not 100% sure what you mean by hook to keep the side door open unless you are referring to something like part # 383400. As far as the back screen vent with windows goes I would need to see a picture of that as well to see if we have anything like that for your application. I have attached a link to the variety of products that we carry for campers that...
    view full answer...
  • Availability of Brackets that Hold Trailer Doors Open
    We have brackets that hold trailer doors open like what you mentioned. We have the part # 383400 for a metal bracket style. Or if you wanted a plunger style that would just require you to push the door in place you would want the part # DH39R.
    view full answer...
  • Trailer Door Holder that Wont Accidently Release the Door
    I do not have a way to test how much force it takes to pull the rubber stem from the socket # DH39R (no force gauge available) but having used this type of door keep before I can tell you that it usually takes a good jerk to free it up. When you want to be positive that the door is going to stay open I recommend using a hook and keeper such as # 383400. I have linked a video review for you.
    view full answer...
  • Recommended Door Holder for Fender Mounting
    The Plastic Stem and Rubber Socket Door Holder - 2" Long Stem # DH39R can be installed onto your fender if desired to allow your door to be secured open. You can alternatively use a Hook and Keeper for Enclosed Trailer Door # 383400 in another location like mounted to the fender to give you a similar option. There is not an option we carry that is long enough to allow connection to the main trailer wall when the fender is making contact with the door.
    view full answer...
  • Latches for Securing Ramp on Open Landscaping Trailer
    Without knowing the dimensions and weight of your ramp it is hard to make a specific product recommendation but we do offer all sorts of trailer hardware. You might do well with an inexpensive hook and keeper like # 383400 or # PLR9-SS, or a spring latch like # SL716. I recommend using one latch on each side of the ramp.
    view full answer...
  • Solution to Hold Swinging Trailer Doors Open
    What we have is a Hook and Keepr # PLR9-SS in stainless steel, # PLR9-A in aluminum, and # 383400 zinc plated. These are used to hold trailer doors open similarly to how you are using a hook and chain. One piece is conneted to the side of the trailer and the other is connected to the door. The hook slides inside of the keeper when open to hold the door in place.
    view full answer...
  • Door Keepers for Enclosed Trailer Doors
    We only have the door keepers available in 4 inch. We have the stainless steel # PLR9-SS, Aluminum # PLR9-A, and Zinc # 383400. We also have some plunger and socket and stem and socket options, but these have less space. I've linked the page to further assist.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
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Michael H
Employee Jameson C
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Employee Adam R
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Adam R
Employee Jeff D
Installed by:
Jeff D
Employee Adam E
Installed by:
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Employee Joshua S
Video Edited:
Joshua S
Employee Dustin K
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Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
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Employee Amanda M
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Employee Mike S
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Employee David F
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