Trailer Hitch Locks | McMaster-Carr

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10 Products

Hitch Pin Locks

Style A

Style B

Secure trailers to vehicles by locking the hitch pin into the receiver—you can't disconnect the trailer without the key. Use them to prevent someone from stealing your trailer or moving it. Built to stand up to any weather, they're great for outdoor trailers. The lock body rotates around your hitch pin, so you can easily reach the key into the cylinder to unlock. A plastic cover protects the key cylinder from water and debris, so it won’t freeze, corrode, or jam.

Style A—Style A lock from the side of your vehicle—access to the key cylinder is perpendicular to the hitch. These locks do not include a hole for a cotter pin. Made of steel, they’re stronger than stainless steel locks. Chrome plating adds corrosion resistance. The included cover is a separate piece.

Style B—Style B lock from behind your vehicle—access to the key cylinder is parallel to the hitch. Made of stainless steel, they resist corrosion better than steel locks. The included cover is connected to the lock.

Keyed Alike—Choose keyed alike locks if you need several locks that open with the same key.

Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.

For 1 1/4" Hitch Receiver Height—Locks for 1 _1/4" hitch receivers fit class I and II hitches.

For 2" Hitch Receiver Height—Locks for 2" square hitch receivers fit class III and IV hitches.

For 2 1/2" Hitch Receiver Height— Locks for 2 _1/2" square hitch receivers fit class III-V hitches.

						Material
Style	Keying	For Hitch Receiver Height and Width	Hitch Pin Style	Dia.	Lg.	Pin	Body	No. of Keys Included	Keyhole Cover Material	Key No.		Each



	A	Keyed Differently	1 1/4" Square	Locking	1/2"	7"	Chrome-Plated Steel	Steel	2	Plastic	—	6685A41	000000


	A	Keyed Differently	2" Square, 2 1/2" Square	Locking	5/8"	7"	Chrome-Plated Steel	Steel	2	Plastic	—	6685A52	00000
	B	Keyed Alike	2" Square	Locking	1"	6 1/4"	Stainless Steel	Anodized Aluminum	2	Plastic	46157	7536N111	00000
	B	Keyed Differently	2" Square	Locking	1"	6 1/4"	Stainless Steel	Anodized Aluminum	2	Plastic	—	7536N112	00000

Hitch-Ball Coupler Locks


Style A	Style B	Style C

Insert these locks into the hitch-ball coupler latch or socket on your trailer to prevent theft. Each lock is plated or powder-coated to stand up to weather, so you can use them on outdoor trailers without worrying about corrosion.

Style A

Style A locks block the latch lever, so no one can open the latch and connect their own vehicle without the key. These locks are a good choice when your vehicle and trailer are unsupervised, such as at refueling stops.

Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.

		Shackle
	Keying	Type	Dia.	Material	Ht.	Wd.	Dp.	No. of Keys Included		Each
Solid Brass-Plated Steel Body



		Keyed Differently	Standard	1/4"	Chrome-Plated Steel	1 3/4"	1 3/4"	7/8"	2	2743T8	000000

Style B

Style B locks block access to the socket, so no one can hitch your trailer without the key. These locks are a good choice when your trailer is unhitched from your vehicle, such as during drop-offs or while in storage. They are one piece and compact for easy installation and storage. Made of aluminum, they resist corrosion better than steel locks.

Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.

	Wd.	Dp.	No. of Keys Included		Each
Solid Powder-Coated Aluminum Body







	Red Body

	Keyed Differently	1 7/8", 2", 2 5/16"	4 5/8"	3 1/4"	3 3/4"	2	6965N11	000000

Style C

Style C locks block access to the socket, so no one can hitch your trailer without the key. These locks are a good choice when your trailer is unhitched from your vehicle, such as during drop-offs or while in storage. They can also be used on ring-type hitches. Made of two hardened steel pieces, they’re heavy duty and stand up to attempts to cut them open better than aluminum locks.

Keyed Alike—Choose keyed alike locks if you need several locks that open with the same key.

Keyed Differently—Choose keyed differently locks if you need locks that each open with a different key.

	Wd.	Dp.	No. of Keys Included	Key No.		Each
Solid Hardened Powder-Coated Steel Body







	Red Body

	Keyed Alike	1 7/8", 2", 2 5/16"	7"	5"	6"	2	46157	6965N12	0000000


	Keyed Differently	1 7/8", 2", 2 5/16"	7"	5"	6"	2	—	6965N13	000000

Hitch Kits


Kit with Cotter Pin	Kit with Locking Pin

Everything you need to attach a hitch to your vehicle's receiver—these kits include a hitch insert, ball, and pin. To match the height of your trailer, you can flip them over to raise or drop the ball. The ball in these kits connects with hitch-ball couplers on trailers.

Locking—Kits with a locking hitch pin prevent your hitch from getting stolen—you can't pull the hitch insert out without the key. A dust cap keeps debris out of the locking mechanism.

For Maximum Trailer Weight—Maximum trailer weight is the total weight being towed.

Vertical Capacity—Vertical capacity (also known as tongue weight) is the weight of the load on the hitch ball.

								Hitch Ball				Hitch Pin
	For Max. Trailer Wt., lb.	Vert. Cap., lb.	Drop Ht.	Rise Ht.	Overall Dp.	For Hitch Receiver Size	No. of Hitch Balls Included	Dia.	Material	Thread Size	Stud Lg.	Dia.	Lg.	Keying	No. of Keys Included		Each
Cotter



		6,000	600	2"	3/4"	11 1/2"	2" × 2" Square	1	2"	Chrome-Plated Steel	1"-14	2"	5/8"	2 7/8"	—	—	9012N11	000000


		Locking



				6,000	600	2"	3/4"	13 1/4"	2" × 2" Square	1	2"	Chrome-Plated Steel	1"-14	2"	5/8"	3 1/4"	Keyed Differently	2	9012N12	00000