Safety Coupler Pins | McMaster-Carr

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Diameter

Usable Length

Retainer Shape

Material

Length

End Type

Retainer Clearance

Retainer Closure

Loop with Easy-Release Tab

Finish

Minimum Hardness

Hardness

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

REACH

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Steel Grade

1008-1010 Low-Carbon Steel

1008-1018 Low-Carbon Steel

1144 Carbon Steel

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123 Products

End Type

Wire Retainer

Install and release more quickly than pins with a through hole or groove

114 products

Locking Retainer

Secure and release the heavy duty retainer with one hand

9 products

Performance

Corrosion Resistant

Resist rust in wet and outdoor environments

50 products

Clevis Pins with Wire Retainer

Since you can quickly install and release the wire retainer, these pins cut down the time it takes to swap out parts. They are typically used to connect drive shafts to equipment such as gearboxes, pumps, and compressors. The retainer pivots to accommodate nearby components. Also known as power take-off (PTO) pins.

Steel


Round-Retainer with Loop Closure	Round-Retainer with Loop Closure with Easy-Release Tab	Square-Retainer with Hook Closure

Square-Retainer with Loop Closure	Square-Retainer with Loop Closure with Easy-Release Tab

Zinc-Plated Carbon Steel—These pins withstand occasional exposure to moisture. However, since friction from moving parts can wear away the finish, they're not ideal for wet environments. While not nearly as corrosion resistant as stainless steel, they are stronger and won’t deform under stress.

Loop Closure with Easy-Release Tab—Grip the tab to open and close with less effort than other wire-retainer clevis pins. The tab sticks out from these pins, so they might catch if space is tight.

	Dia.	Usable Lg.	Dia. Tolerance	Retainer Clearance	Min. Hardness	Lg.		Each
Zinc-Plated Carbon Steel







				Round-Retainer with Loop Closure

				1/4"	1 3/16"	-0.005" to 0.002"	1 5/8"	Rockwell B55	1 15/16"	98416A011	00000


				1/4"	1 3/8"	-0.005" to 0.002"	1 9/16"	Rockwell B55	2 5/16"	98416A012	0000
				1/4"	1 3/4"	-0.007" to -0.002"	1 5/8"	Not Rated	2 1/4"	98416A568	0000
				1/4"	2 3/16"	-0.005" to 0.002"	1 3/4"	Rockwell B55	3 1/16"	98416A120	0000
				5/16"	1 3/16"	-0.005" to 0.002"	1 9/16"	Rockwell B55	1 15/16"	98416A015	0000
				5/16"	1 3/8"	-0.005" to 0.002"	1 1/2"	Rockwell B55	2 5/16"	98416A125	0000
				5/16"	1 3/4"	-0.007" to -0.002"	1 5/8"	Not Rated	2 1/4"	98416A569	0000
				5/16"	2 3/16"	-0.005" to 0.002"	1 11/16"	Rockwell B55	3 1/16"	98416A130	0000
				5/16"	2 1/2"	-0.007" to -0.002"	2"	Not Rated	3 1/16"	98416A570	0000
				3/8"	1 3/16"	-0.005" to 0.002"	1 1/2"	Rockwell B55	1 15/16"	98416A016	0000
				3/8"	1 3/8"	-0.005" to 0.002"	1 7/16"	Rockwell B55	2 5/16"	98416A135	0000


				3/8"	1 1/2"	-0.007" to -0.002"	1 1/2"	Not Rated	2 1/16"	98416A571	0000
				3/8"	2 3/16"	-0.005" to 0.002"	1 5/8"	Rockwell B55	3 1/16"	98416A140	0000




						Round-Retainer with Loop Closure with Easy-Release Tab

						1/4"	1 3/8"	-0.005" to 0.002"	1 9/16"	Rockwell B55	2 5/16"	98416A211	0000


						1/4"	1 3/4"	-0.007" to -0.002"	1 5/8"	Not Rated	2 1/4"	98416A572	0000
						5/16"	1 3/8"	-0.005" to 0.002"	1 1/2"	Rockwell B55	2 5/16"	98416A215	0000
						5/16"	2 3/16"	-0.005" to 0.002"	1 3/4"	Rockwell B55	3 1/16"	98416A217	0000
						3/8"	1 3/8"	-0.005" to 0.002"	1 7/16"	Rockwell B55	2 5/16"	98416A219	0000
						3/8"	2 3/16"	-0.005" to 0.002"	1 3/4"	Rockwell B55	3 1/16"	98416A223	0000




								Square-Retainer with Hook Closure

								1/4"	3"	-0.010" to 0.002"	1 1/2"	Rockwell B55	3 3/4"	97143A600	0000


								1/4"	3 1/2"	-0.010" to 0.002"	1 3/4"	Rockwell B55	4 1/4"	97143A610	0000
								1/4"	4"	-0.010" to 0.002"	2"	Rockwell B55	4 3/4"	97143A615	0000
								5/16"	3"	-0.010" to 0.002"	1 1/2"	Rockwell B55	3 3/4"	97143A620	0000
								5/16"	3 1/2"	-0.010" to 0.002"	1 3/4"	Rockwell B55	4 1/4"	97143A625	0000
								5/16"	4"	-0.005" to 0.002"	2"	Rockwell B55	4 3/4"	97143A630	0000
								3/8"	3"	-0.010" to 0.002"	1 1/2"	Rockwell B55	3 3/4"	97143A635	0000
								3/8"	3 1/2"	-0.010" to 0.002"	1 3/4"	Rockwell B55	4 1/4"	97143A640	0000
								3/8"	4"	-0.005" to 0.002"	2"	Rockwell B55	4 3/4"	97143A645	0000
								1/2"	3 1/2"	-0.016" to 0.016"	2 1/2"	Rockwell C22	5 1/8"	97143A650	0000
								1/2"	4 1/4"	-0.015" to 0.000"	3"	Rockwell B90	6"	97143A681	0000


								5/8"	4"	-0.016" to 0.016"	3 3/8"	Rockwell C22	5 3/4"	97143A651	00000
								5/8"	4 1/4"	-0.015" to 0.000"	3"	Rockwell B90	6"	97143A682	0000
								3/4"	4"	-0.016" to 0.016"	3 1/4"	Rockwell C22	5 3/4"	97143A652	00000
3/4"								4 1/4"	-0.015" to 0.000"	3"	Rockwell B90	6"	97143A683	0000
3/4"	6"							-0.016" to 0.016"	3 1/4"	Rockwell C22	7 3/4"	97143A653	00000
3/4"	6 1/4"							-0.015" to 0.000"	3"	Rockwell B90	8"	97143A684	00000
7/8"	5 1/2"							-0.016" to 0.016"	3 1/4"	Rockwell C22	7 3/8"	97143A670	00000
7/8"	6 1/4"							-0.015" to 0.000"	3 1/4"	Rockwell B90	7 1/2"	97143A685	00000
1"	5 1/2"	-0.016" to 0.016"						3 1/4"	Rockwell C22	7 3/8"	97143A675	00000
1"	6 1/4"	-0.015" to 0.000"	3 1/4"					Rockwell B90	7 3/4"	97143A686	00000




		Square-Retainer with Loop Closure

		1/4"	1 7/8"					-0.005" to 0.002"	1 5/8"	Rockwell B55	2 13/16"	98416A009	0000


		1/4"	2 3/16"					-0.005" to 0.002"	1 3/4"	Rockwell B55	3 1/16"	98416A013	0000
		1/4"	2 1/2"					-0.007" to -0.002"	1 9/16"	Not Rated	3"	98416A573	0000
		1/4"	2 7/8"					-0.005" to 0.002"	1 11/16"	Not Rated	3 5/8"	98416A563	0000
		5/16"	1 7/8"					-0.005" to 0.002"	1 9/16"	Rockwell B55	2 13/16"	98416A017	0000
		5/16"	2 3/16"					-0.005" to 0.002"	1 11/16"	Rockwell B55	3 1/16"	98416A014	0000
		5/16"	2 1/2"					-0.007" to -0.002"	1 3/4"	Not Rated	3 1/16"	98416A574	0000
		5/16"	2 7/8"					-0.005" to 0.002"	1 11/16"	Rockwell B55	3 9/16"	98416A525	0000
		5/16"	3 7/16"					-0.005" to 0.002"	1 5/8"	Not Rated	4 5/16"	98416A564	0000
		5/16"	3 9/16"					-0.005" to 0.002"	1 5/8"	Not Rated	4 13/16"	98416A565	0000
		3/8"	1 7/8"					-0.005" to 0.002"	1 1/2"	Rockwell B55	2 13/16"	98416A018	0000


		3/8"	2 3/16"					-0.005" to 0.002"	1 5/8"	Rockwell B55	3 1/16"	98416A019	0000
		3/8"	2 1/4"	-0.007" to -0.002"				1 1/2"	Not Rated	2 7/8"	98416A575	0000
		3/8"	2 7/8"	-0.005" to 0.002"	1 5/8"			Rockwell B55	3 9/16"	98416A531	0000
		3/8"	3 7/16"	-0.005" to 0.002"	1 5/8"			Not Rated	4 5/16"	98416A566	0000
		3/8"	3 9/16"	-0.005" to 0.002"	1 5/8"			Not Rated	4 13/16"	98416A567	0000
		1/2"	3 3/32"	-0.005" to 0.002"	1 5/8"			Rockwell B55	3 13/16"	98416A562	0000




				Square-Retainer with Loop Closure with Easy-Release Tab

				1/4"	2 1/4"			-0.005" to 0.002"	1 5/8"	Not Rated	3 1/16"	98416A401	0000


				5/16"	2 1/4"			-0.005" to 0.002"	1 5/8"	Not Rated	3 1/16"	98416A409	0000
				3/8"	2 1/4"	-0.005" to 0.002"		1 5/8"	Not Rated	3 1/16"	98416A417	0000

SAE J429 Steel

Square-Retainer

with Loop

Closure

These pins conform to SAE International (formerly the Society of Automotive Engineers) dimensional standards.

Zinc-Flake-Coated Carbon Steel—With a more durable finish than zinc plating, these pins hold up in wet and outdoor environments. While not as corrosion resistant as stainless steel, they are stronger and won't deform under stress.

	Retainer Clearance	Min. Hardness	Lg.		Each
Black-Zinc-Flake-Coated Carbon Steel







	Square-Retainer with Loop Closure

	1/4"	2 3/16"	-0.005" to 0.002"	1 3/4"	Not Rated	3 1/16"	97143A687	00000


	5/16"	2 3/16"	-0.005" to 0.002"	1 11/16"	Not Rated	3 1/16"	97143A688	0000
	3/8"	2 3/16"	-0.005" to 0.002"	1 5/8"	Not Rated	3 1/16"	97143A689	0000
	1/2"	3"	-0.005" to 0.002"	1 5/8"	Not Rated	3 13/16"	97143A690	0000

Corrosion-Resistant Stainless Steel


Round-Retainer with Loop Closure	Round-Retainer with Loop Closure with Easy-Release Tab	Square-Retainer with Hook Closure

Square-Retainer with Loop Closure	Square-Retainer with Loop Closure with Easy-Release Tab

18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They're strong enough to fasten most components but won't withstand stress and vibration as well as steel.

	Usable Lg.	Dia. Tolerance	Retainer Clearance	Min. Hardness	Lg.		Each
18-8 Stainless Steel







			Round-Retainer with Loop Closure

			1/4"	1 1/8"	-0.005" to 0.000"	1 5/8"	Rockwell B75	2"	98480A009	00000


			1/4"	1 3/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2 3/8"	98480A011	0000
			1/4"	1 3/4"	-0.007" to -0.002"	1 5/8"	Rockwell B80	2 3/8"	98480A681	0000
			1/4"	2 1/8"	-0.005" to 0.000"	1 3/4"	Rockwell B75	3 1/8"	98480A120	0000
			5/16"	1 1/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2"	98480A014	0000
			5/16"	1 3/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2 3/8"	98480A015	0000
			5/16"	1 3/4"	-0.007" to -0.002"	1 5/8"	Rockwell B80	2 1/4"	98480A682	0000
			5/16"	2 1/8"	-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/8"	98480A130	0000
			5/16"	2 1/2"	-0.007" to -0.002"	2"	Rockwell B80	3 1/16"	98480A683	0000
			3/8"	1 1/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2"	98480A016	0000
			3/8"	1 3/8"	-0.005" to 0.000"	1 3/8"	Rockwell B75	2 3/8"	98480A018	0000


			3/8"	1 1/2"	-0.007" to -0.002"	1 1/2"	Rockwell B80	2 1/16"	98480A684	00000
			3/8"	2 1/8"	-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/8"	98480A140	0000




					Round-Retainer with Loop Closure with Easy-Release Tab

					1/4"	1 3/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2 3/8"	98480A031	0000


					1/4"	1 3/4"	-0.007" to -0.002"	1 5/8"	Rockwell B80	2 3/8"	98480A685	0000
					5/16"	1 3/8"	-0.005" to 0.000"	1 1/2"	Rockwell B75	2 3/8"	98480A034	0000
					5/16"	2 1/8"	-0.005" to 0.000"	1 3/4"	Rockwell B75	3 1/8"	98480A217	0000
					3/8"	1 3/8"	-0.005" to 0.000"	1 3/8"	Rockwell B75	2 3/8"	98480A037	0000
					3/8"	2 1/8"	-0.005" to 0.000"	1 3/4"	Rockwell B75	3 1/8"	98480A223	0000




							Square-Retainer with Hook Closure

							1/4"	3"	-0.010" to 0.000"	1 1/2"	Rockwell B75	3 11/16"	98480A600	00000


							1/4"	3 1/2"	-0.010" to 0.000"	1 3/4"	Rockwell B75	4 3/16"	98480A610	00000
							1/4"	4"	-0.010" to 0.000"	2"	Rockwell B75	4 11/16"	98480A615	00000
							5/16"	3"	-0.010" to 0.000"	1 1/2"	Rockwell B75	3 11/16"	98480A620	00000
							5/16"	3 1/2"	-0.010" to 0.000"	1 3/4"	Rockwell B75	4 3/16"	98480A625	00000
							5/16"	4"	-0.010" to 0.000"	2"	Rockwell B75	4 11/16"	98480A630	00000
							3/8"	3"	-0.010" to 0.000"	1 1/2"	Rockwell B75	3 11/16"	98480A635	00000
							3/8"	3 1/2"	-0.010" to 0.000"	1 3/4"	Rockwell B75	4 3/16"	98480A640	00000
							3/8"	4"	-0.010" to 0.000"	2"	Rockwell B75	4 11/16"	98480A645	00000
							1/2"	3 1/2"	-0.016" to 0.016"	2 1/2"	Rockwell B75	5 1/8"	98480A650	00000
							5/8"	4"	-0.016" to 0.016"	3 3/8"	Rockwell B75	5 3/4"	98480A651	00000


							3/4"	4"	-0.016" to 0.016"	3 1/4"	Rockwell B75	5 3/4"	98480A652	00000
							3/4"	6"	-0.016" to 0.016"	3 1/4"	Rockwell B75	7 3/4"	98480A653	00000
							7/8"	5 1/2"	-0.016" to 0.016"	3 1/4"	Rockwell B75	7 5/16"	98480A660	00000
1"							5 1/2"	-0.016" to 0.016"	3 1/4"	Rockwell B75	7 5/16"	98480A680	00000




	Square-Retainer with Loop Closure

	1/4"	1 7/8"					-0.005" to 0.000"	1 5/8"	Rockwell B75	2 7/8"	98480A012	0000


	1/4"	2 1/8"					-0.005" to 0.000"	1 3/4"	Rockwell B75	3 1/8"	98480A013	0000
	1/4"	2 1/2"					-0.007" to -0.002"	1 9/16"	Rockwell B80	3"	98480A686	0000
	5/16"	1 7/8"					-0.005" to 0.000"	1 1/2"	Rockwell B75	2 7/8"	98480A017	0000
	5/16"	2 1/8"					-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/8"	98480A125	0000
	5/16"	2 1/2"					-0.007" to -0.002"	1 3/4"	Rockwell B80	3 1/16"	98480A687	0000
	5/16"	2 7/8"					-0.005" to 0.000"	1 5/8"	Rockwell B75	3 5/8"	98480A525	0000
	3/8"	1 7/8"					-0.005" to 0.000"	1 1/2"	Rockwell B75	2 7/8"	98480A019	0000
	3/8"	2 1/8"					-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/8"	98480A135	0000
	3/8"	2 1/4"					-0.007" to -0.002"	1 1/2"	Rockwell B80	2 7/8"	98480A688	00000
	3/8"	2 7/8"					-0.005" to 0.000"	1 5/8"	Rockwell B75	3 5/8"	98480A531	0000


	1/2"	3"					-0.005" to 0.000"	1 5/8"	Rockwell B75	3 13/16"	98480A562	00000




							Square-Retainer with Loop Closure with Easy-Release Tab

			1/4"				2 1/4"	-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/16"	98480A401	00000


			5/16"	2 1/4"			-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/16"	98480A409	00000
			3/8"	2 1/4"			-0.005" to 0.000"	1 5/8"	Rockwell B75	3 1/16"	98480A417	00000
			3/8"	2 1/2"			-0.007" to -0.002"	1 1/2"	Rockwell B80	3 1/16"	98480A689	00000

Clevis Pins with Locking Retainer

Secure and release these heavy duty pins with one hand. Swing the welded solid steel retainer closed, and it locks onto the pin until you press the lever to open. Unlike other clevis pins, you don’t have to reach around to insert a cotter pin or worry about it falling out. These are often used for towing since they make it easy to hitch and unhitch your equipment.

Steel

Powder-Coated Carbon Steel—A shiny black finish creates a barrier against rust in damp and outdoor environments. While not as corrosion resistant as stainless steel, these pins are stronger and won't deform under stress.

	Retainer Clearance	Min. Hardness	Lg.		Each
Black-Powder-Coated Carbon Steel







	Square-Retainer

	5/8"	4 1/2"	-0.003" to 0.010"	3 1/4"	Rockwell C32	8"	91533A100	000000


	3/4"	4 1/2"	-0.003" to 0.010"	3"	Rockwell C32	8"	91533A200	00000
	3/4"	6"	-0.003" to 0.010"	3 1/8"	Rockwell C32	10"	91533A250	00000
	7/8"	4 1/2"	-0.003" to 0.010"	3 1/8"	Rockwell C32	8"	91533A300	00000
	7/8"	6"	-0.003" to 0.010"	3 1/8"	Rockwell C32	10"	91533A350	00000
	1"	6"	-0.003" to 0.010"	3"	Rockwell C32	10"	91533A400	00000
	1 1/8"	7"	-0.003" to 0.010"	3 7/8"	Rockwell C32	11"	91533A500	00000
	1 1/4"	7"	-0.003" to 0.010"	3 7/8"	Rockwell C32	11"	91533A600	00000
	1 1/2"	8"	-0.003" to 0.010"	3 3/4"	Rockwell C32	12"	91533A700	00000