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  1. Trailer Hitch Lock
  2. Roadmaster
  3. Fits 2 Inch Hitch
  4. Standard Pin Lock
  5. Keyed Alike
  6. 4 Inch Span
Roadmaster Hitch Lock for 2" Hitches - 4" Span - Qty 2

Roadmaster Hitch Lock for 2" Hitches - 4" Span - Qty 2

Item # RM-316
Our Price: $63.39
You Save: 24%
Trailer Hitch Lock
Shipping Weight: 2 lbs
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Discourage theft and tampering on your Roadmaster towing system with this hitch pin. Includes 2 locks with keys. Great Prices for the best trailer hitch lock from Roadmaster. Roadmaster Hitch Lock for 2" Hitches - 4" Span - Qty 2 part number RM-316 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (72)
  • Q & A (0)
  • Videos (2)
  • Photos

Roadmaster Trailer Hitch Lock - RM-316

  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Alike
  • Roadmaster
  • 4 Inch Span
  • Chrome
  • Bent Pin

Discourage theft and tampering on your Roadmaster towing system with this hitch pin. Includes 2 locks with keys.


  • Trailer receiver hitch lock offers additional security for your towing system
    • Designed for use with 2" x 2" trailer hitches
  • Constructed of hardened steel with solid brass components
  • Includes 2 locks with keys


  • Pin diameter: 5/8"
  • Span length: 4"
  • Limited lifetime warranty

316 Road Master Hitch Lock for 2" Hitches - 5/8" Diameter - 4" Span - Keyed Alike - Quantity 2

Video of Roadmaster Hitch Lock for 2" Hitches - 4" Span - Qty 2

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

Video Transcript for Roadmaster Hitch Locks - Standard Pin Lock - RM-316 Review

Today we're going to take a look at the Roadmaster 2-pack receiver hitch locks that are keyed alike. Now these locks are designed to be used with 2 inch by 2 inch trailer hitches. They are keyed alike locks to secure any two components in your towing set up like when you're using a dual hitch adapter where you might have a trailer on the bottom hitch and a bike rack on the top. These are a five eighths inch pin diameter. This kit, again, comes with the two locks, two keys per lock, and both locks are keyed alike. Does have these nice rubber covers you can see attached to the lock. This will help keep any dirt or grime from getting into the locks and all you have to do is insert your key, turn it a quarter of a turn, you can see the lock comes right off the pin. Then to install it, you don't need to have the key in there.

You can just put this through and then push it on and it locks into place. Now the inside usable length on this pin is going to be right at about three and three quarter inches. Now these are also perfect for use with a Roadmaster high low adapter which is used for proper positioning of the tow bar when you're flat towing a vehicle and I happened to pull one of those high low adapters just to give you an example of how these locks would work on that. Here's one right here. You can see this portion will slide into the tow vehicle and this is where your tow bar would slide into that. What you could basically do is let's just pop off the cover here and take our key, unlock it. Then you can see you can put it up through here, let's get the holes lined up.

Once you slide that through, just go ahead and take your lock and all you have to do is push it on and then that'll lock it to the tow vehicle. Then this other one. Again, you can use any keys because they are keyed alike. Just unlock that one, put the cover back on. You can slide this one once you install your tow bar in there and slide that through there and then push that on and then you notice you have it locked in both places, so you have no worries. That should do it for the review on the Roadmaster 2-pack receiver hitch locks that are keyed alike.

Customer Satisfaction Score:

Customer Reviews

Roadmaster Hitch Lock for 2" Hitches - 4" Span - Qty 2 - RM-316

Average Customer Rating:  5.0 out of 5 stars   (72 Customer Reviews)

Discourage theft and tampering on your Roadmaster towing system with this hitch pin. Includes 2 locks with keys.


I have two curt channel hitches on two different trucks and it was hard to find a quality extra long hitch lock. These work perfect!



This product is excellent and I highly recommend it to anyone that is looking for that little extra length hitch lock.


Shopping at etraileris always a pleasant experience. The representatives are always helpful and knowledgeable. The hitch locks work great. Thanks


Super good quality. Finally found a set of locks with matching keys. No more key for this, key for that fumbling around. Just push the lock on the pin and your're good to go! Also, good quality dust covers.



These are the best locks on the market out there. So easy to use! I love how easy it is to just push them on to lock them. I do a lot of travel and use them regularly. This is a good quality product Ive been using for about a year now.


These are great quality locks. They’re sturdy and easy to operate. I’ve been using them for a year without issues. The rubber end caps stay secure and have not deteriorated.


Just installed. Fits well on my Roadmaster Hitch extension with 10 inch drop and bike rack riser hitch.

Etrailer has promot shipping and great customer service.

Brenda S.




Ordered my tow bar, a 10" riser, some adapters, locks and anti-rattle brackets. Was notified that the adapters and anti-rattle brackets were on back order. Cancelled those two items and they shipped the rest. Received in two days and everything arrived in good condition. Was able to order the remaining two items elsewhere and still have everything I needed prior to leaving for vacation.
Big thanks to Chedi for working with me and getting everything shipped so fast. Great company, great people and great products. Will definitely order from them again.


Locks look sturdy and easy to use. Can push lock on without key and lock seems to come off easily. So far so good I’ll try it out tomorrow as I am leaving on a trip. I bought two because I have a drop hitch and Blue Ox tow bar.
Shipment receipt was exactly as stated - Friday delivery! Thank you etrailer!


Super easy to use great construction.


Yep I was very glad to find that they had dual pins that were key to like it makes a great when you have to use a hitch raise or lower extension assembly where you have to lock into pieces


This is an excellent heavy duty lockable tow pin- two locks keyed the same work great for adding high/low adapter.


working so far, nice to only have one key, a 4 pack would be nice.


My father in law was very pleased with his hitchlocks! These were a christmas gift and exactly what he wanted. We named them Alfred Hitchlock.


Caroline B. was very helpful & polite. Nice hitch locks. Super fast shipping! Thank You!


Excellent product! I have another set of these I ordered previously from etrailer. They too are excellent! They are solid products and it’s nice to cut down on the number of keys to keep track of.


These work as expected/hoped and I have not had any issues with them!


Katie kept me informed when there was a delay and she even split my order and gave me the option of springing for a 2 day delivery on the items that were available when I told her I was going on a trip shortly - - well worth it.


All products recieved sooner than expected and as always in good condition. It has always been a pleasure to deal with E-Trailer and I will continue to do my business with you. Thank you for your professional way and follow up.




Quality pins/locks. Did the job well.


Good quality Fast delivery



It works great no problems


Ellen was outstanding. Very informative and knowledgable. I would recommend her advice and to all my friends. *


Love the product as we have many, but when needed a pair keyed alike this was perfect. Thanks for a great price!!


great to be keyd alike as they will always be used together with the drop adapter


Good product. Just what i need for my drop hitch.


Fair price, great product, prompt deliv ery.


very convenient to have same key for both locks.

Show More Reviews

See what our Experts say about this Roadmaster Trailer Hitch Lock

  • Usable Length of Roadmaster Trailer Hitch Lock Kit Keyed Alike
    The Roadmaster Trailer Hitch Locks # RM-316 is a 5/8 inch diameter pin that is 4 inches to the bend when the lock is on. I went out to the warehouse and measured to confirm this for you. I've attached a photo as well.
    view full answer...
    Image 1 for
  • Recommended 5/8" Thick Locking Hitch Pins With A 4" Span
    For a 4" span the Roadmaster Hitch Lock for 2" Hitches # RM-316 you were looking at is going to the be the best option since it comes with two locks that keyed alike.
    view full answer...
  • What is Weight Capacity of Roadmaster Trailer Hitch Locks # RM-316
    Yes, the Roadmaster Trailer Hitch Locks # RM-316 that you referenced are rated for 10,000 lbs. I also attached a review video for this lock set for you to check out as well.
    view full answer...
  • High Quality Hitch Lock with 4 inch Span that Can be Keyed Alike
    For a high quality set of two hitch locks that have the span you need and are keyed alike the Roadmaster Hitch Lock for 2" Hitches # RM-316 would be what you'd want. These have a 4 inch span and a lifetime warranty.
    view full answer...
  • Will The NSA Ready Brute 2 Tow Bar Work With The Roadmaster High-Low Adapter
    I reached out to Roadmaster and they stated that if the NSA Ready Brute 2 tow bar has a 2 inch stinger connection that will go to the RV's hitch receiver that it would with The Roadmaster High-Low Adapter # RM-048-10. The Roadmaster High-Low Adapter is constructed of sturdy steel. It has a solid shank that gives it superior strength and durability. The adapter resists rust and corrosion with its black powder coat finish. The adapter has a gross towing weight up to 10,000 pounds. The...
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  • Trailer Hitch Lock with 5/8 Diameter Pin Available Keyed Alike In Quantity of 4
    Unfortunately, the Roadmaster # RM-316 aren't available keyed alike in multiples greater than the included 2. This being said, I might have an option that would allow you to get as many similar locks as you'd like that would be keyed alike. The etrailer brand # e98881 hitch lock has a 5/8 diameter pin, same as the Roadmaster locks. The usable span of the locking pin is 3-5/8 inches, so if that's enough space, this would be a great (not to mention, much less expensive) option. I've linked...
    view full answer...
  • Is Hitch Pin and Clip Included with Roadmaster High-Low Adapter RM-070
    The Roadmaster High-Low Adapter # RM-070 does not come with a hitch pin and clip or lock. It is sold separately. For a pin and clip, you can use part # PC3, or for a lock, we have part # RM-315 for a single lock, or part # RM-316 for a pair of locks.
    view full answer...
  • Hitch Pin and Lock Recommendations for Roadmaster High/Low Adapters
    The High/low adapter # RM-072-2 does not come with a hitch pin. It takes a 5/8 inch diameter pin or lock. For a regular pin and clip you can use # PC3. For a lock you can use # RM-316 which is a set of 2 that are keyed alike.
    view full answer...
  • Recommended Hitch Locks To Secure Roadmaster Nighthawk Tow Bar To TOAD and Motorhome
    The Roadmaster Trailer Hitch Locks # RM-316 you were looking at will lock the Roadmaster High-Low Adapter to your 2021 Jayco Class A's trailer hitch receiver, and the Roadmaster Nighthawk All-Terrain # RM-676 to the adapter, but will not lock the tow bar yo your Jeep. You will also want to add the Quick-Disconnect Padlocks for Roadmaster Tow Bars - Qty 2 # RM-302 which will replace the quick disconnect pins holding your tow bar to the Roadmaster Base Plate Kit # RM-521453-5 on your 2021...
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  • GenY and Roadmaster Hitch Pin Weight Capacity Comparisons
    Roadmaster hitch pins like # RM-316 and # RM-910034 are both rated for 10,000lbs. The GenY hitch pins like the # 325-GH-099 are rated for 32,000lbs. If you were using the # RM-316 the only way the lock would fall off is if it wasn't properly seated on the hitch pin when installed. If you were using the # RM-910034 the hitch pin clip could've came off. The GenY hitch pin clips wrap down for a bit of extra protection from coming off unlike the Roadmaster hitch pin clips. When -installing...
    view full answer...
  • Hitch Adapter to Raise Height of Cargo Carrier for Batter Ground Clearance
    We can help you with a 2-inch hitch adapter that will give you a height rise for better ground clearance with your CargoPod hitch cargo carrier. I suggest the Roadmaster 2-inch High-Low Adapter # RM-048-8. The Roadmaster has a solid steel shank for strength rather than a hollow one like the Malone # MPG544 and it gives you a full 8-inches of rise. This too will reduce your hitch's rated capacity by 50-percent, the same as the Malone, and it also shares the same 400-lb tongue weight (TW)...
    view full answer...
  • Using a Bike Rack on a 2015 BMW X5 With Park Assist
    I have some potential solutions for you, however with anything in the trailer hitch, there's a good chance that the sensor will pick up the hitch rise. The sensors are tuned to look in a fairly wide cone around the four broadcast points, and its difficult for them to not work. Even though this is kind of the point of the feature, its' extremely annoying when you're trying to use the utility aspect of the vehicle. You can turn the sensor off manually when you get into the vehicle, but...
    view full answer...
    Image 1 for
  • Parts Needed to Flat-Tow a 2016 Ford Focus
    In order to flat-tow a 2016 Ford Focus with all four wheels on the ground you are going to need a base plate kit, tow bar, safety cables, supplemental braking system, wiring harness, and possible high-low adapter. Before getting started, I highly recommend taking a look in the owner's manual for any specific procedures that must be done while in tow. For a base plate kit, I recommend the Roadmaster EZ5 Base Plate Kit part # RM-524443-5 as long as you do not have adaptive cruise control....
    view full answer...

Do you have a question about this Trailer Hitch Lock?

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Andrew K
Video by:
Andrew K
Employee Michael B
Video by:
Michael B
Employee Jeff D
Installed by:
Jeff D
Employee Robert C
Installed by:
Robert C
Employee Adele M
Updated by:
Adele M
Employee Laura H
Updated by:
Laura H
Employee Wilson B
Updated by:
Wilson B
Employee Manda E
Updated by:
Manda E
Employee Zach D
Video Edited:
Zach D
Employee Shane H
Test Fit:
Shane H

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