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  1. Trailer Hitch Lock
  2. Fastway
  3. Fits 2-1/2 Inch Hitch
  4. Standard Pin Lock
  5. Keyed Alike
  6. 3-5/8 Inch Span
Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts

Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts

Item # FA86-00-3685
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Trailer Hitch Lock
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Trailer Hitch Lock FA86-00-3685 - Fits 2-1/2 Inch Hitch - Fastway
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Designed for your Flash E Series ball mount, this lock set includes a 5/8" lock to replace the adjustment pin that holds the ball mount platform in place on the shank, and a 5/8" lock to secure the ball mount in your 2-1/2" receiver. Lowest Prices for the best trailer hitch lock from Fastway. Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts part number FA86-00-3685 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (148)
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Fastway Trailer Hitch Lock - FA86-00-3685

  • Fits 2-1/2 Inch Hitch
  • Standard Pin Lock
  • Keyed Alike
  • Fastway
  • 3-5/8 Inch Span
  • Steel
  • Flush Pin

Designed for your Flash E Series ball mount, this lock set includes a 5/8" lock to replace the adjustment pin that holds the ball mount platform in place on the shank, and a 5/8" lock to secure the ball mount in your 2-1/2" receiver.


  • Flush-style lock set for Fastway Flash E Series ball mounts helps prevent theft
    • Hitch receiver lock is used in place of a standard hitch pin and clip to secure the shank of your ball mount in your receiver
    • Locking adjustment pin is used in place of the standard adjustment pin to secure the ball mount platform to the ball mount
  • Sturdy and durable steel construction
    • Sleek chrome-plated finish resists corrosion
  • Tube key lock cylinder provides better security than standard key mechanisms
    • Harder to pick and resists drilling
    • More difficult to duplicate keys
  • Weather-resistant rubber dust caps keep cylinders free from water and debris
  • 2 Keyed-alike tube keys included


  • Application: Fastway Flash E HD Series adjustable ball mounts (FA42-00-2625, FA42-00-2825, and FA42-00-2925)
    • Fits 2-1/2" hitch receivers
  • Hitch receiver lock:
    • Pin diameter: 5/8"
    • Inside pin length: 3-5/8"
  • Locking adjustment pin:
    • Pin diameter: 5/8"
    • Inside pin length: 4-1/2"

86-00-3685 Fast Way Hitch Receiver Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts - 2-1/2" Hitches

Customer Reviews

Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts - FA86-00-3685

Average Customer Rating:  4.8 out of 5 stars   (148 Customer Reviews)

Designed for your Flash E Series ball mount, this lock set includes a 5/8" lock to replace the adjustment pin that holds the ball mount platform in place on the shank, and a 5/8" lock to secure the ball mount in your 2-1/2" receiver.


Great addition to your Fastway hitch fits perfect


The hitch lock works as advertised. Only down side was it sticks out a fair amount on both sides making breakaway chain attachment a little difficult.


Working great! Replaced similar product but with key, because the keys are break after repeated use (move my hitch between trucks), which happened to me. With this type of key system I don’t think I will have that problem anymore. Give it 10 stars if I could!


My Reese adjustable receiver hitch requires a lock with a 3 3/4” minimum shaft on the lock. This 4” fits fine. 3” fits receiver so now I have one key for both another plus for removing from vehicle to vehicle. Most all stores only carry up to 3 5/8” not long enough for the lock to latch. Actual lock piece is much heavier also.

Product is fine still often meets my needs.
Kieran - 04/24/2019


Great service! Shipping was quick and on time, and the hitch I ordered was just as advertised, even better looking than The pictures. I definitely recommend etrailer!!


Just what I needed for my Dmax dually. Like the look and quality of the the product.

Locks are easy to use and add finishing touch to hitch...
David R - 06/19/2018


Great product, great great service, super fast shipping


The locking pins fit great and function properly! I'm sure they will keep unwanted hands off of them!


Great locking system.


These are definitely worth the money to protect your hitch from threft.


Very satisfied with my new FASTWAY TRAILER HITCH and LOCK SET.


It's awesome. We pull 12-15k lbs regularly for work and then I flip it over for my 19' mb sport 190 ski boat. No banging clanking or jerking comes off this thing. 10/10 would recommend


I’ve had for about one year. Still works flawlessly as it did on day one.

Rob - 10/29/2021


Fits well and easy to use


Excellent product !
It solved the problem
of having multiple different hitches in my truck.
Great looking, with a weight rating far greater than any other hitch I had.
I'm giving my other hitches away now !


It has a cheesy rubber cap that the carwash brush will knock off. Then it is just a matter of time for the lock to fill with dirt, etc making it very difficult to unlock. Almost never got it off after a couple of months. It would be fine if you didn't leave it on the truck. Of course, if you didn't why would you need a lock.


Looks like a good product.


Fit and finish is great, does the job it was made for.

Great! Would definitely purchase again.
Tim - 08/01/2021


Pins are exactly what I needed for my extra wide hitch and great material. Easy to use and love the same key so not so many on key chain.

Still working great just like when I first got it. No problems at all.
robert p - 05/13/2020


Product look good for about a month then it started to rust up. Then the lock wouldn’t open to adjust the hitch. Had to cut it off. Don’t waste your money. Poor quality . Hitch is also terrible lost its luster after a couple of months,both balls rusted up and loosened up. The money it cost isn’t worth it.


You can still pop off the lock with a pair of needle nose pliers but its better than nothing. I usually remove my hitch when I'm not towing anyway.


Just purchased a Fastway FLASH E-series HD adjustable ball mount for my new '17 F250 Superduty. The mount looks great out of the box and fantastic on the truck. Will be towing a triple axle trailer with 30' center console soon as well as a utility trailer off and on. Nice to have one set-up that's able to tow two different loads. The polished finish is very nice and the matching lock set looks very secure. Amazingly fast shipping from too. Even curious George likes it.


Excellent customer service from sale to follow-up on order receipt. Product exceeded what was expected and arrived as promised. Needed a much heavier hitch for my 3/4 ton Duramax with a 2 1/2" receiver tube. Perfect combination of weight ratings and adjustability. Will definitely do more business with etrailer.


Great customer service! Very punctually on the shipping and delivery!


This product looked very nice on line , It had great reviews and the price was right.
The hitch will be used on a work pick hauling multiple trailers which is why we need the versatility of the two ball sizes. We also bought the recommended lock set for this hitch. We were very impressed with the hitch once we received it , which came very quickly and in great shape.
I would recommend this product at this time.

Show More Reviews

Ask the Experts about this Fastway Trailer Hitch Lock

  • Fastway Lock Set Compatible with Flash E Series HD Ball Mount
    The Trailer Hitch Lock # FA86-00-3685 is what you need for the Flash E Series HD Adjustable Ball Mount # FA42-00-2825.
    view full answer...
  • Weight Capacity of Fastway Trailer Hitch Lock and Adjustment Pin Lock Set # FA86-00-3685
    The Fastway Trailer Hitch Lock and Adjustment Pin Lock Set # FA86-00-3685 referenced in your question does not have a specific towing weight capacity. These will be used to secure the ball mount shank into the hitch receiver and the ball mount platform to the ball mount on the Flash E Series Ball Mounts like # FA42-00-2625. You will simply follow the weight capacity of the ball mount or whichever component in your towing system has the lowest rating.
    view full answer...
  • How to Order Replacement Key for Fastway Trailer Lock FA86-00-3685
    I checked your order notes and it looks like you have the part # FA86-00-3685. With the key number you have on your keys you can order replacements. What you will need to do is search our website for the FA-KEY- followed by the key number and you'll see the correct key. For example if you have key number 302 the key you would need is part # FA-KEY-302.
    view full answer...
  • Recommended Locking Hitch Pins 5/8 Inch Diameter Keyed Alike for 2-1/2 Inch Trailer Hitch Receiver
    The Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts # FA86-00-3685 does not allow a 3rd pin keyed alike although the 2 in the kit come keyed alike. If you want 3 pins 5/8 inch diameter, then our Hitch Receiver Lock - Extra Long - Flush Design for 2-1/2" Trailer Hitches # e98881 is the only option, but you can get as many as you like. This will work with the Fastway Trailer Hitches but won't have separate lengths like the kit.
    view full answer...
  • Recommended Matching Locks for Trailer Hitch and Trailer Coupler
    I have just what you are looking for in the Master Lock Hitch Receiver and Coupler Latch Lock Set part # 2848DAT which comes with both a hitch pin lock (1/2" for 1-1/4" and 5/8" for 2") as well as a matching pin lock for the trailer coupler.
    view full answer...
  • Keyed Alike Locking Pin For Ball Adjustment And Hitch Pin On Fastway Ball Mount
    The Fastway Flash E Series Adjustable, Aluminum Ball Mount - 2 Chrome Balls - 6" Drop, 7" Rise - 10K, # FA42-00-2600 you said you have is a fit for 2 inch hitch receivers not 2-1/2 inch hitch receivers. The Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series Ball Mounts, # FA86-00-3660, is a fit for this hitch and its compatible 2 inch receiver opening measured inside to inside. I'm guessing that you measured the receiver from outside vs. the inside opening and this...
    view full answer...
  • Hitch Lock and Adjustment Pin Lock Set For 2-1/2 Inch Hitch
    We have hitch lock and adjustment locking pin sets for 2-1/2 inch trailer hitches, but none that have a 1/2 inch adjustable locking pin. The reason is these sets are designed to fit specific ball mounts that have their own pin diameters, and both of the sets we offer have 5/8 inch diameter hitch locks and adjustment locks. There may very well be one with a 1/2 inch pin, but not that we carry; if you let me know what specific ball mount you have I may be able to confirm. What we offer...
    view full answer...
  • Will Fastway Trailer Hitch Lock be Safe for 18,000 lb Rated Hitch?
    The Fastway Trailer Hitch Lock and Adjustment Pin Lock Set # FA86-00-3685 does not have a particular weight capacity. It has been designed for use with Fastway Flash E Series ball mounts like # FA42-00-2825. The lock set will fit 2-1/2" receivers and has a 5/8" pin diameter. I have added a video review of this product for you to take a look at.
    view full answer...
  • Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts
    The Trailer Hitch Receiver Lock # e98881 is the longest of the hitch receiver locks available and it has a 3-5/8" inside width, which you can use as the lock for your Flash E Series HD Adjustable 2-Ball Mount # FA42-00-2825. There is not a separate locking adjustment pin available, however, which is what you may have been referring to. For that you will need the Fastway Trailer Hitch Lock and Adjustment Pin Lock Set for Flash E Series HD Ball Mounts # FA86-00-3685. This lock set fits...
    view full answer...
  • Is A Flash Self-Locking Aluminum Ball Mount For 2-1/2 Inch Receiver Available?
    I contacted the manufacturer and there is not a Flash self-locking, aluminum ball mount available like Item # DTLBM9200 in a 2-1/2 inch size. Other options are available but they would be like the Flash E Series HD Adjustable 2-Ball Mount for 2-1/2 inch Hitch, Item # FA42-00-2625. If you wanted a hitch lock then you would need something like Item # FA86-00-3685. I have attached links to our available inventory and to a video for you to check out.
    view full answer...
  • Recommended Adjustable Ball Mount for Towing 17,000 Pound Trailer
    I do have a solution for you, however the B&W Tow & Stow 3-Ball Mount # BWTS20049B referenced in your question has a maximum towing capacity of 14,500 pounds when using the 2-5/16 inch hitch ball. I instead recommend looking at the Fastway Flash E Series HD Adjustable 2-Ball Mount # FA42-00-2825. This adjustable ball mount will fit your 2-1/2 inch hitch receiver and has up to an 18,000 pound capacity with the 2-5/16 inch hitch ball. The ball mount also includes a 2 inch hitch ball (with...
    view full answer...
  • Keyed-Alike Locks for 2-1/2 Hitch Receiver and Ball Mount
    We have keyed-alike hitch locks for the 2-1/2-inch hitch on your Ram 2500 that are displayed on the linked page. All of the items shown can be ordered in multiples that are keyed alike. You will just want to confirm the necessary length and diameter to match your hitch accessories. We have standard pin locks like # e98881 and pin lock sets like # FA86-00-3685 and we also have special vehicle-specific BOLT locks that can be coded to use your truck's key. Part # BL7018448 will code to a...
    view full answer...
  • Recommendations for Locking Hitch Pin and Locking Adjustable Ball Mount Pin Keyed Alike
    It sounds like you are talking about a lock set that includes one hitch lock and a second lock for an adjustable ball mount. We have locking pin set # FA86-00-3685 that could potentially work for you. In this set the 5/8 inch diameter hitch lock has a inside pin length of 3-5/8 inches. The adjustment pin is also 5/8 inch and has a length of 4-1/2 inches. We also have lock set # AM3492. It also includes two 5/8 inch diameter locking pins. The inside span of the hitch lock is 3-5/16 inches...
    view full answer...
  • Adjustable Aluminum Ball Mount for a 2017 Chevrolet Silverado 2500 with 2-1/2 Inch Receiver Tube
    We have a number of adjustable ball mounts that will fit the 2-1/2" receiver tube opening on your 2017 Chevrolet Silverado 2500 which I have attached for you. However, the Rapid Hitch Adjustable Aluminum Ball Mount Kit part # AM3400 or part # AM3405 are designed to fit a 2" receiver tube opening therefore will not work for you. The difference between them is that part # AM3405 has a nylon cap which will not require lubrication. They both have zinc plated hitch balls. Instead, I recommend...
    view full answer...
  • Adjustable 20,000 lb Ball Mount Option with Silver Colored Hitch Ball
    I have a possible solution for you, but Curt does not offer a silver two ball attachment for the Curt Adjustable Ball Mount # C45902. One possible solution for you is the Fastway E Series HD Adjustable 18K Ball Mount # FA42-00-2625. A nice feature about the Fastway ball mount is the corrosion resistant aluminum construction. This will be good if you are in a cold climate with salt on the roads. A hitch lock is also available for this ball mount, # FA86-00-3685. If you don't need both...
    view full answer...
  • Recommended Ball Mount With 2.5 Inch Shank And 14,500 lb Capacity
    Other than the Weigh Safe options of # LTB10-25 and # WS10-25, I have one more option available for you. The Fastway Flash E Series HD Adjustable 2-Ball Mount - 2-1/2" Hitch - 10" Drop, 10" Rise - 18K # FA42-00-2925 will give you an 8-7/8 inch distance from the center of the hitch pin hole to the center of the hitch ball. If you go with the Weigh Safe option, I recommend the Locking Dual Pin Assembly and Hitch Pin Set for 180 Hitch and Weigh Safe 2-Ball Mounts - Keyed Alike # WS06 to...
    view full answer...
  • Comparing Fastway and Weigh Safe Adjustable 2 Ball Mounts for a 2018 Ram 2500 Tradesman
    If you plan on only hauling bigger trailers with your 2018 Ram 2500 then I recommend going with the Flash E Series HD Adjustable 2-Ball Mount # FA42-00-2925 for a few reasons. The first is that it has a higher weight rating than the Weigh Safe 180 Hitch 2-Ball Mount # LTB10-25, and the second being that you can add the lock set # FA86-00-3685 to lock the ball mount and the adjustable ball. The Weigh Safe comes with a lock for the adjustable ball but you would need to use part # WS06 to...
    view full answer...
  • Can Fastway Self-Locking Adjustable 3-Ball Mount be Used with 3 Inch Receiver and Reducer Sleeve
    I spoke with my contact at Fastway regarding the Self-Locking Adjustable 3-Ball Mount 2.5 Inch # DTALBM6825-3S referenced in your question. He stated that this actually will not work with the 3 inch receiver on your Ford F-350, even when using the Ford provided reducer sleeve. This is because of the design on the self-locking system that is utilized with this particular ball mount. The integrated locking knobs on the shank will do a great job of securing itself to the reducer sleeve, but...
    view full answer...

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