Trailer Locks & Security Accessories
Coupler locks, king pin locks, hitch pin locks, wheel locks, and latch guards — Blaylock, BOLT & comparable. The right lock depends on your coupler style and size, so know that before you shop.
Locks & Security Accessories we carry
- Coupler Locks
- King Pin Locks
- Hitch Pin Locks
- Wheel Locks
- Latch Guards
Don’t see it? We special-order too. .
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Let’s Find the Part You Need
Your parts counter
Pick a store to see its parts line and hours. Your request goes straight to that counter.
Tell us what you need
Before you order locks & security
A few things to check so the part fits the first time, or just tell us what you’ve got and the parts team will spec it with you.
- Match the coupler
- A coupler lock has to fit your coupler: 2″, 2-5/16″, or gooseneck. It’s stamped on the latch.
- King-pin by trailer type
- Gooseneck and 5th-wheel trailers use a king-pin lock sized to the pin. Tell us the trailer type.
- Receiver pin size
- Lockable hitch pins fit 1-1/4″ or 2″ receivers. Give us the size.
- Key alike
- Locking down a whole trailer? We can key multiple locks alike so one key runs them all.
Locks & Security Accessories in our catalog
A sample of the trailer locks & security accessories in our parts catalog. Tap any part to see the details, then request it from your nearest store.
- Lock Coupler Gooseneck 25K for Auto LatchGenY Hitch
- Lock Coupler Gooseneck 30K for Manual LatchGenY Hitch
- Encasement Lock for 2-5/16IN Bulldog CouplerBulldog
- Encasement Lock for 2IN Bulldog CouplerBulldog
- Lock Coupler Bumper Pull 1 7/8"-2 5/16" Bulldog - BLAYLOCKBulldog
- Lock Coupler Bumper Pull 2" Demco Weld OnDemco
- Lock Coupler Bumper Pull for Demco 2 5/16" with Puck LockDemco
- Lock Coupler Bumper Pull UniversalBlaylock
- Lock Coupler Gooseneck Bulldog Coupler/Set Screw with PuckBulldog
- Lock Coupler Gooseneck for Demco Set Bolt LockDemco
- Lock Coupler Gooseneck for Demco w/ Puck LockDemco
- Lock Coupler Gooseneck for Ram/Pac Rim CouplersBlaylock
This is a sample, not the full catalog. If you don’t see it, .
Locks & Security Accessories FAQ
- What lock fits my trailer coupler?
- Match the lock to the coupler style and size. Ball-in-coupler locks fill the socket of a standard 2" or 2 5/16" bumper-pull coupler so it can't be dropped onto a ball; latch-style locks pin the coupler latch shut; gooseneck couplers take a lock made for their inner tube and locking collar. Check the coupler size stamped on top before buying — most locks are size-specific.
- How do I keep my trailer from being stolen?
- Layer it. A coupler lock stops the drive-up-and-hitch theft; a wheel lock (boot) stops the trailer from rolling at all; a hitch pin lock keeps your ball mount and hitch from walking off; and parking with the tongue facing away from the street adds friction. No single lock stops a determined thief — the goal is to make your trailer the slowest, loudest target on the lot.
- Do trailer locks actually prevent theft?
- They're deterrents, not guarantees — anything can be defeated with enough time and tools. What locks do is add time, noise, and visibility, which is exactly what opportunistic thieves avoid. Hardened one-piece locks with shielded shackles resist bolt cutters far better than bargain padlocks, and combining two different lock types beats one expensive lock. Record your VIN and keep photos; it matters if the worst happens.
Need trailer locks & security accessories?
Tell us the trailer and the part. The nearest store confirms fit and availability.