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  1. Trailer Hitch Lock
  2. Roadmaster
  3. Fits 2 Inch Hitch
  4. Standard Pin Lock
  5. Keyed Unique
  6. 4 Inch Span
Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks

Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks

Item # RM-304
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Trailer Hitch Lock
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Shipping Weight: 1.87 lbs
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RM-304 - Bent Pin Roadmaster Trailer Hitch Lock
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Discourage theft and tampering and guard against accidental release of your Roadmaster towing system by replacing your quick-disconnect safety pins with steel padlocks. Included hitch lock provides extra security. Lowest Prices for the best trailer hitch lock from Roadmaster. Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks part number RM-304 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (24)
  • Q & A (0)
  • Videos (2)
  • Photos
  • Why etrailer?

Roadmaster Trailer Hitch Lock - RM-304

  • Fits 2 Inch Hitch
  • Standard Pin Lock
  • Keyed Unique
  • Roadmaster
  • 4 Inch Span
  • Steel
  • Bent Pin

Discourage theft and tampering and guard against accidental release of your Roadmaster towing system by replacing your quick-disconnect safety pins with steel padlocks. Included hitch lock provides extra security.


  • Quick-disconnect padlocks
    • Provide visible deterrent to theft and tampering
    • Lock for increased security
    • Guard against accidental release
    • Constructed with hardened steel shackle and solid brass tumbler
  • Trailer receiver hitch lock
    • Offers additional security for your towing system
    • Hardened steel pin and solid brass lock components
    • Designed for use with 2" x 2" hitches
  • Complete set includes 1 hitch lock, 2 keyed-alike padlocks and keys
    • Only padlocks are keyed alike; hitch lock requires separate key
  • Products made in the USA


  • Hitch lock:
    • Pin diameter: 5/8"
    • Usable length: 4"
  • Limited Lifetime Warranty

304 Roadmaster Receiver Hitch Lock and 2-Pack of Quick-Disconnect Locks

Video of Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks

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

Video Transcript for Roadmaster Hitch Lock and Quick Disconnect Padlock Set Review

Today we're going to be taking a look at the Roadmaster Lock Set Hitch Lock and 2 Quick-Disconnect Padlocks, part number RM-304. Now this is what they're going to look like once they're installed. You're going to have 4 inches of usable pin, so if you have an extra adapter on there it'll still fit. You have this nice safety cap and weather protector on the end. And your kit does come with 6 keys. The two padlocks on our pins are going to be keyed alike and the one on the hitch pin is keyed separately.

They're made up of solid brass tumbler and hardened steel and on the inside of our lock they're epoxy coated to help protect against corrosion and rust. These are going to help you have peace of mind that your vehicle's not going to come unhitched if the pin comes loose because we have padlocks in place. It's going to help deter people thinking about steeling your tow bar or your vehicle. Now, let me run over our features. This is what your kit's going to consist of. You're going to have a hitch pin lock and two padlocks that are going to fit your tow bar quick net pins.

We'll remove our hitch pin, slide in our new Roadmaster hitch pin, place on the protective cap and now that our tow bar is locked to the RV. We'll take our lock, slip it in, secure it and we'll repeat this process on the other side. That's going to do it for a look at the Roadmaster Lock Set Hitch Lock and 2 Quick-Disconnect Padlocks, part number RM-304. .

Customer Reviews

Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks - RM-304

Average Customer Rating:  4.6 out of 5 stars   (24 Customer Reviews)

Discourage theft and tampering and guard against accidental release of your Roadmaster towing system by replacing your quick-disconnect safety pins with steel padlocks. Included hitch lock provides extra security.


The wrong part was ordered from Road Master which I caught etrailer error and corrected the error. Plus etrailer shipped me everything except the part for the frame. I had to wait two months to get the part and could not drive the car as it was at the mechanic waiting for the part.


My order arrived on time and was the best price I could find. Thank You

Still working fine. No issues
Glen - 02/25/2022


Seem to be well made and easy to use. Wish each lock was keyed differently. Love etrailer!!


Great product, works well!


They were as expected, work as intended.


Some difficulty unlocking because it is behind wide flange. There isn’t a better solution that I’m aware of.


Fit perfectly. Not many choices out there for the big receiver on a 2018 Super Duty and this is a good one. Not sure why they included the 2 padlocks though, I have no use for them.


Wish they were keyed the same, that may fault for not requesting that when I ordered.


Great set of locks and the added protection securing my TOAD to the RV gives me great peace of mind while towing


The lock set keeps the hitch and the tow bar from being stolen. These things work and haven't caused me any issues.


Just received the locks. Look good but haven't used them yet.
e-Trailer great to work with.


We have it all hooked up. Everything fits properly. We are doing the electric on Saturday. Your videos are most helpful. I took a video on my phone, but I'm sorry that I do not know how to apply it to this review. George was most helpful.


Always quality products and fast shippi ng.


Outstanding service and great product


I have been using it for over a year and it works great.


Excellent service; shipped right way and arrived on time. A well built lock set, solid construction.


The locks are excellent. I am towing my truck behind my RV and they will make it more secure.



good product good value, extremely fast shipping.








Ask the Experts about this Roadmaster Trailer Hitch Lock

  • Troubleshooting Removing Toad from Tow Bar with Locks Installed
    The Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks # RM-304 does lock the easy disconnection points. You are correct that someone really determined to disconnect your vehicle will still be able to remove hardware and roll it away. If you are concerned about this, there are other things you can do to deter that theft. Obviously this is only an issue when you are stopped, so you can put your toad vehicle in park and even set the emergency brake making sure it is not easy...
    view full answer...
  • Which Lock Kit is Recommended for Roadmaster Sterling Tow Bar
    The lock kit that is recommend for the Roadmaster Sterling Tow Bar part # RM-576 is actually the part # RM-304. This comes with a hitch pin lock and two pad locks. I attached a review video for more info as well.
    view full answer...
  • Lock Recommendation for Roadmaster Base Plate Kit
    Roadmaster uses a specific connection style for their locks, so for a lock set that would lock the base plates to the vehicle and the tow bar to the hitch of the tow vehicle you would want part # RM-304 or part # RM-302 for just the base plate locks. The lock kit part # BX88177 would only work with a Blue Ox system that uses their style of lug connection.
    view full answer...
  • Recommended Locks for Roadmaster Nighthawk Towbar and Roadmaster Baseplate
    For Roadmaster base plates and tow bars you'll want to use the # RM-304, since the Blue Ox # BX88177 is only designed for Blue Ox base plates. This kit comes with locks for the base plates and a locking hitch pin so you can secure your Roadmaster Nighthawk # RM-676 to the RV.
    view full answer...
  • Recommended Hitch Lock For Roadmaster Falcon 2 Tow Bar # RM-520
    I have another option for you, but the etrailer Adjustable Trailer Coupler Latch Lock - 1/2" to 2-1/2" Span - 1/4" Diameter # e98883 you were looking at is for the coupler of a trailer and will not work with the Roadmaster Falcon 2 Tow Bar # RM-520 you mentioned. Instead I recommend the Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks # RM-304 which will work perfectly with the # RM-520 and the 2" receiver on your 2019 Freedom Elite. This kit also includes two pad locks...
    view full answer...
  • Recommended Keyed Alike Padlocks and Hitch Locks
    Roadmaster does not offer the Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks # RM-304 and the Roadmaster Quick Disconnect Padlocks (Qty 4) # RM-308 keyed alike. The only option we have for you to get all keyed alike padlocks and hitch locks is to use the BOLT system that keys to your vehicle ignition key. For instance if you have a Ford, you would use the # BL7018519 padlock and the # BL7018447 Hitch Lock.
    view full answer...
  • Hitch Pin Replacement For Roadmaster BlackHawk 2 Tow Bar
    If you are just seeking a hitch pin for the Roadmaster Blackhawk 2 tow bar, then you will simply use a standard 2 inch receiver hitch pin like # 37201074. If you want a locking hitch pin, then I recommend the Flint Hill Goods Padlock Style Hitch Receiver Lock # FHG63VR. You may want to consider the Roadmaster Lock Set - Hitch Lock and 2 Quick-Disconnect Padlocks # RM-304.
    view full answer...
    Image 1 for
  • Recommended Flat Towing System for 2016 Wrangler JK 2 Door
    I'm happy to help get you everything you need for your 2016 Jeep Wrangler JK to flat tow it. You have done your homework so my recommendations will be in line. I recommend the Roadmaster Crossbar-Style Base Plate Kit - Removable Arms # RM-521448-4 you suggested which will utilize the crossbar of the Roadmaster Sterling All Terrain Tow Bar # RM-576. This is a great combination with the tow bar also having the wiring cord and the safety cables integrated. Then you will use the Hopkins...
    view full answer...
    Image 1 for Image 2 for
  • Tow Bar, Base Plate, Wiring, Braking System to Flat Tow 2003 Subaru Impreza and 1998 Toyota 4Runner
    I spoke with my contact at Roadmaster and Base Plate Kit, # 916-1 is the correct base plate kit for your 2003 Subaru Impreza. The Base Plate Kit, # 1148-1, is the correct kit for your 1998 Toyota 4Runner. The RoadMaster Falcon 2 Tow Bar, # RM-520, that you mentioned is a good, economical choice with many great features like a quick disconnect system, telescoping arms for easy hookup, and a full length steel cross bar to help support your vehicle frame. As for a towing kit, I recommend...
    view full answer...
  • Recommended Parts to Flat Dinghy/Recreational Tow a 2018 Ford C-Max Hybrid
    The following parts that are mentioned on the answer page are actually great choices for your 2018 Ford C-Max: Base Plate Kit - # 524432-1 Falcon 2 Tow Bar - # RM-520 Safety Cables - # RM-643 Wiring Kit - # RM-15267 Blue Ox Patriot III Braking System - # BRK2019 The only thing that I would recommend differently is that if you plan on towing frequently to use the SMI Stay-IN-Play DUO # SM99251 instead. This is also a proportional system but it remains installed on your C-Max and is much...
    view full answer...
  • Parts Needed to Flat Tow a 2015-2019 Chevy Silverado or GMC Sierra 3500
    The parts to flat tow a 3rd generation 3500 GM pickup will actually be almost identical whether it is a Chevy Silverado or a GMC Sierra since they are essentially the same vehicle. To flat tow any vehicle you will need a base plate kit, tow bar, safety cables, vehicle tow bar wiring, a supplemental braking system, and possibly a high-low adapter. The base plate kit that I recommend for your application is the Roadmaster MS Base Plate Kit # RM-3180-2 as this fixed arm system adds a rugged...
    view full answer...
  • Will Carpod, Walled, Folding Cargo Carrier Fit on a 2013 Ford Escape Titanium With Tow Package
    Yes, the Carpod Walled, Folding Cargo Carrier # M2205-01-02 will fit your 2013 Ford Escape providing your trailer hitch has a 2 inch receiver. Personally, I would pick this one in a heartbeat if I still had kids at home and had to carry sporting equipment, backpacks or other odd shaped cargo. I also like the 5 inch shank rise, you can never have too much ground clearance. With that being said, the measurement from the center of the pin hole to where the shank begins to rise is 2-1/2 inches....
    view full answer...

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Info for this part was:

Employee Joshua S
Video by:
Joshua S
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Andrew S
Installed by:
Andrew S
Employee Wilson B
Updated by:
Wilson B

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