Metric Cotter Pins | McMaster-Carr

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Cotter Pin Type

Wire Diameter

Material

Pin Type

Clevis Pin Diameter

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Specifications Met

Performance

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Number of Pieces

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192 Products

Cotter Pin Type

Standard

Bend the prongs to secure the ends of clevis pins and shafts

155 products

Hairpin

Push into a hole for simple one-step installation

37 products

Performance

Corrosion Resistant

Resist rust in wet and outdoor environments

73 products

Reusable

Install and remove without bending for repeated use

37 products

Cotter Pins

Lock the ends of clevis pins and shafts to keep components in place. Slide these cotter pins into a hole and then bend the prongs outward with pliers to secure. Also known as split pins, one prong is slightly longer than the other for easy opening once inserted. Repeated bending will weaken the pin, so they should not be reused.

Steel

Zinc-Plated Spring 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.

	Lg., mm	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Spring Steel





				1 mm Diameter
				8	DIN 94, ISO 1234	200	98350A130	00000
				10	DIN 94, ISO 1234	200	98350A135	0000
				12	DIN 94, ISO 1234	200	98350A601	00000
				16	DIN 94, ISO 1234	200	98350A602	00000
				20	DIN 94, ISO 1234	200	98350A140	0000
				25	DIN 94, ISO 1234	200	98350A603	00000



						1.6 mm Diameter
						8	DIN 94, ISO 1234	200	98350A605	00000
						10	DIN 94, ISO 1234	200	98350A606	00000
						12	DIN 94, ISO 1234	200	98350A607	00000
						16	DIN 94, ISO 1234	200	98350A608	00000
						20	DIN 94, ISO 1234	200	98350A609	00000
						25	DIN 94, ISO 1234	200	98350A611	00000
						32	DIN 94, ISO 1234	200	98350A612	00000
						36	DIN 94, ISO 1234	200	98350A613	00000
						40	DIN 94, ISO 1234	200	98350A614	00000



								2 mm Diameter
								10	DIN 94, ISO 1234	50	98350A615	0000
								12	DIN 94, ISO 1234	50	98350A150	0000
								16	DIN 94, ISO 1234	50	98350A616	0000
								18	DIN 94, ISO 1234	50	98350A617	0000
								20	DIN 94, ISO 1234	50	98350A160	0000
								22	DIN 94, ISO 1234	50	98350A618	0000
								25	DIN 94, ISO 1234	25	98350A170	0000
								32	DIN 94, ISO 1234	25	98350A180	0000
								36	DIN 94, ISO 1234	50	98350A619	0000
								40	DIN 94, ISO 1234	25	98350A190	0000
								45	DIN 94, ISO 1234	25	98350A195	0000
								50	DIN 94, ISO 1234	25	98350A200	0000



										2.5 mm Diameter
										16	DIN 94, ISO 1234	50	98350A621	0000
										20	DIN 94, ISO 1234	50	98350A210	0000
										25	DIN 94, ISO 1234	25	98350A215	0000
										32	DIN 94, ISO 1234	25	98350A220	0000
										36	DIN 94, ISO 1234	50	98350A622	0000
										40	DIN 94, ISO 1234	25	98350A230	00000
										45	DIN 94, ISO 1234	25	98350A240	0000
										50	DIN 94, ISO 1234	25	98350A250	0000



												3.2 mm Diameter
												10	DIN 94, ISO 1234	50	98350A623	0000
												16	DIN 94, ISO 1234	50	98350A624	0000
												18	DIN 94, ISO 1234	50	98350A625	0000
												20	DIN 94, ISO 1234	50	98350A260	0000
												25	DIN 94, ISO 1234	25	98350A270	0000
												28	DIN 94, ISO 1234	25	98350A626	0000
												32	DIN 94, ISO 1234	25	98350A280	0000
36												DIN 94, ISO 1234	25	98350A627	0000
40	DIN 94, ISO 1234											25	98350A290	0000
45	DIN 94, ISO 1234											25	98350A305	0000
50	DIN 94, ISO 1234	25										98350A310	0000
63	DIN 94, ISO 1234	25	98350A330									0000



		4 mm Diameter
		20	DIN 94, ISO 1234									50	98350A350	0000
		25	DIN 94, ISO 1234									25	98350A360	0000
		28	DIN 94, ISO 1234									25	98350A631	0000
		32	DIN 94, ISO 1234									25	98350A365	0000
		36	DIN 94, ISO 1234									25	98350A632	0000
		40	DIN 94, ISO 1234	25								98350A370	0000
		45	DIN 94, ISO 1234	25	98350A380							0000
		50	DIN 94, ISO 1234	25	98350A390							00000
		56	DIN 94, ISO 1234	25	98350A410							00000
		63	DIN 94, ISO 1234	25	98350A430							00000
		71	DIN 94, ISO 1234	25	98350A440							00000



				5 mm Diameter
				25	DIN 94, ISO 1234							25	98350A450	0000
				32	DIN 94, ISO 1234							25	98350A460	00000
				36	DIN 94, ISO 1234							25	98350A635	00000
				40	DIN 94, ISO 1234							25	98350A470	00000
				45	DIN 94, ISO 1234	25						98350A475	00000
				50	DIN 94, ISO 1234	25	98350A480					00000
				56	DIN 94, ISO 1234	25	98350A636					00000
				63	DIN 94, ISO 1234	25	98350A490					00000
				71	DIN 94, ISO 1234	25	98350A500					00000
				80	DIN 94, ISO 1234	25	98350A637					00000
				100	DIN 94, ISO 1234	25	98350A638					00000



						6.3 mm Diameter
						40	DIN 94, ISO 1234					10	98350A540	0000
						50	DIN 94, ISO 1234					10	98350A550	0000
						56	DIN 94, ISO 1234					10	98350A643	0000
						63	DIN 94, ISO 1234					10	98350A570	0000
						71	DIN 94, ISO 1234					10	98350A580	00000
						80	DIN 94, ISO 1234					10	98350A644	00000
						90	DIN 94, ISO 1234	10				98350A600	00000
						100	DIN 94, ISO 1234	10	98350A610			00000



								8 mm Diameter
								40	DIN 94, ISO 1234			10	98350A620	00000
								45	DIN 94, ISO 1234			10	98350A646	00000
								50	DIN 94, ISO 1234			10	98350A630	00000
								56	DIN 94, ISO 1234			10	98350A647	00000
								63	DIN 94, ISO 1234			10	98350A640	00000
								71	DIN 94, ISO 1234			10	98350A650	00000
								80	DIN 94, ISO 1234			10	98350A648	00000
								90	DIN 94, ISO 1234	10		98350A670	00000
								100	DIN 94, ISO 1234	10	98350A680	00000
								125	DIN 94, ISO 1234	5	98350A690	00000



										10 mm Diameter
										63	DIN 94, ISO 1234	10	98350A710	00000
										71	DIN 94, ISO 1234	5	98350A720	00000
										80	DIN 94, ISO 1234	5	98350A652	00000
										90	DIN 94, ISO 1234	5	98350A740	00000
										100	DIN 94, ISO 1234	5	98350A750	00000
125										DIN 94, ISO 1234	1	98350A770	0000
140	DIN 94, ISO 1234									1	98350A654	0000



										13 mm Diameter
										125	DIN 94, ISO 1234	1	98350A655	0000
										140	DIN 94, ISO 1234	1	98350A656	0000

Corrosion-Resistant Stainless Steel

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

	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel





			1.6 mm Diameter
			8	DIN 94, ISO 1234	100	98350A208	00000
			10	DIN 94, ISO 1234	100	98350A211	0000
			12	DIN 94, ISO 1234	100	98350A212	0000
			14	DIN 94, ISO 1234	100	98350A811	00000
			16	DIN 94, ISO 1234	100	98350A216	0000
			20	DIN 94, ISO 1234	100	98350A813	00000
			22	DIN 94, ISO 1234	100	98350A814	00000
			25	DIN 94, ISO 1234	100	98350A815	00000
			28	DIN 94, ISO 1234	100	98350A816	00000



					2 mm Diameter
					10	DIN 94, ISO 1234	100	98350A311	0000
					12	DIN 94, ISO 1234	100	98350A312	00000
					14	DIN 94, ISO 1234	100	98350A817	00000
					16	DIN 94, ISO 1234	100	98350A316	00000
					20	DIN 94, ISO 1234	100	98350A320	00000
					22	DIN 94, ISO 1234	100	98350A818	00000
					25	DIN 94, ISO 1234	100	98350A325	00000
					28	DIN 94, ISO 1234	100	98350A819	00000
					32	DIN 94, ISO 1234	50	98350A332	00000
					40	DIN 94, ISO 1234	50	98350A821	00000



							2.5 mm Diameter
							12	DIN 94, ISO 1234	100	98350A824	00000
							16	DIN 94, ISO 1234	100	98350A658	00000
							18	DIN 94, ISO 1234	100	98350A825	00000
							20	DIN 94, ISO 1234	100	98350A826	00000
							22	DIN 94, ISO 1234	100	98350A827	00000
							25	DIN 94, ISO 1234	100	98350A659	00000
							50	DIN 94, ISO 1234	100	98350A831	00000



									3.2 mm Diameter
									16	DIN 94, ISO 1234	50	98350A832	00000
									18	DIN 94, ISO 1234	50	98350A662	00000
									20	DIN 94, ISO 1234	50	98350A351	00000
									22	DIN 94, ISO 1234	50	98350A352	00000
									25	DIN 94, ISO 1234	25	98350A355	00000
									32	DIN 94, ISO 1234	25	98350A362	00000
									40	DIN 94, ISO 1234	25	98350A834	0000
									45	DIN 94, ISO 1234	25	98350A835	00000
									50	DIN 94, ISO 1234	25	98350A836	00000



											4 mm Diameter
											20	DIN 94, ISO 1234	25	98350A842	00000
											25	DIN 94, ISO 1234	25	98350A425	00000
											28	DIN 94, ISO 1234	25	98350A663	00000
											32	DIN 94, ISO 1234	25	98350A432	00000
											40	DIN 94, ISO 1234	25	98350A845	00000
											80	DIN 94, ISO 1234	25	98350A852	00000



											5 mm Diameter
	32										DIN 94, ISO 1234	10	98350A502	00000
	36	DIN 94, ISO 1234									10	98350A855	00000
	40	DIN 94, ISO 1234									10	98350A510	00000
	45	DIN 94, ISO 1234									10	98350A856	00000
	50	DIN 94, ISO 1234									10	98350A515	00000
	80	DIN 94, ISO 1234									10	98350A859	00000



											6.3 mm Diameter
											32	DIN 94, ISO 1234	5	98350A862	00000
											40	DIN 94, ISO 1234	5	98350A575	00000
											45	DIN 94, ISO 1234	5	98350A863	00000
			50								DIN 94, ISO 1234	5	98350A590	00000
			56	DIN 94, ISO 1234							5	98350A864	00000
			63	DIN 94, ISO 1234							5	98350A865	00000
			90	DIN 94, ISO 1234							5	98350A868	00000



											8 mm Diameter
											63	DIN 94, ISO 1234	5	98350A875	00000
											90	DIN 94, ISO 1234	5	98350A878	00000
											100	DIN 94, ISO 1234	5	98350A667	00000



					10 mm Diameter
					71								DIN 94, ISO 1234	5	98350A669	00000

Hairpin Cotter Pins

Secure components more quickly than standard cotter pins. One prong is already bent, so just push into a hole for installation in one step. Although hairpins are reusable, they don’t withstand vibration as well as standard and hammer-set cotter pins. Also known as hitch pin clips and R-clips.

Steel

	Wire Dia., mm	Eye Dia., mm	Lg., mm	Specs. Met	Pkg. Qty.		Pkg.
Zinc-Plated Spring Steel


	6 to 11	2	10	50	—	5	98350A131	00000
	9 to 14	2	10	57	DIN 11024	10	98350A910	0000
	9 to 14	2.5	10	50	—	5	98350A132	0000
	10 to 16	3	18	72	DIN 11024	5	98350A920	0000
	10 to 16	3.5	18	70	—	5	98350A134	0000
	16 to 20	4	20	74	DIN 11024	5	98350A930	0000
	16 to 20	4	21	85	—	5	98350A133	0000
	16 to 26	4.5	21	82	—	10	98350A136	0000
	20 to 28	5	24	85	—	5	98350A137	00000
	20 to 28	5	24	102	DIN 11024	5	98350A940	00000
	28 to 40	6	24	105	—	5	98350A138	00000
	28 to 40	6	30	126	DIN 11024	1	98350A950	0000
	28 to 45	7	30	105	—	1	98350A139	0000
	28 to 45	7	30	127	DIN 11024	1	98350A960	0000
	30 to 45	8	28	110	—	1	98350A141	0000
	30 to 45	8	28	132	DIN 11024	1	98350A970	0000

Corrosion-Resistant Stainless Steel

Super-Corrosion-Resistant 316 Stainless Steel—Superior to 18-8 stainless steel, these pins won't degrade when exposed to harsh weather, salt water, and most chemicals. They're strong enough to join most components but won't withstand extreme stress and vibration as well as steel.

	Wire Dia., mm	Eye Dia., mm	Lg., mm	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel


	9 to 14	2	10	57	DIN 11024	1	98350A111	00000
	10 to 16	3	18	72	DIN 11024	1	98350A112	0000
	16 to 20	4	20	74	DIN 11024	1	98350A113	0000
	20 to 28	5	24	102	DIN 11024	1	98350A114	00000
	28 to 40	6	30	126	DIN 11024	1	98350A115	00000

	Super-Corrosion-Resistant 316 Stainless Steel


			9 to 14	2	10	48	DIN 11024	1	98350A116	0000
			9 to 15	2.5	10	53	DIN 11024	1	98350A117	0000
			10 to 16	3	18	70	DIN 11024	1	98350A118	00000
			16 to 20	4	20	76	DIN 11024	1	98350A119	00000
			20 to 28	5	24	100	DIN 11024	1	98350A411	00000
			28 to 40	6	30	125	DIN 11024	1	98350A412	00000

Long-Life Hairpin Cotter Pins

You can use these pins over and over without reducing their hold, and they're quicker to install than standard cotter pins. One prong is already bent, so just push into a hole to secure parts in one step. Although the coil maintains tension, hairpins don’t withstand vibration as well as standard and hammer-set cotter pins. Also known as hitch pin clips and R-clips.

Steel

	Wire Dia., mm	Eye Dia., mm	Lg., mm	Pkg. Qty.		Pkg.
Zinc-Plated Spring Steel


	8 to 14	2	11	56	1	98335A201	00000
	14 to 20	3	17	73	1	98335A202	0000
	17 to 24	4	26	94	1	98335A203	0000
	18 to 30	5	27	110	1	98335A204	0000
	24 to 36	6	32	142	1	98335A205	0000
	26 to 40	7	31	152	1	98335A206	0000

Corrosion-Resistant Stainless Steel

	Wire Dia., mm	Eye Dia., mm	Lg., mm	Pkg. Qty.		Pkg.
18-8 Stainless Steel


	8 to 14	2	11	56	1	92391A201	00000
	14 to 20	3	17	73	1	92391A202	0000
	17 to 24	4	26	94	1	92391A203	0000
	24 to 36	6	32	142	1	92391A205	00000

Cotter Pin Assortments

Keep a range of sizes on hand to lock the ends of clevis pins and shafts and keep components in place. Slide these cotter pins into a hole and then bend the prongs outward with pliers to secure. Also known as split pins, one prong is slightly longer than the other for easy opening once inserted. Repeated bending will weaken the pin, so they should not be reused.

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.

	No. of Pieces	Container Type	Specs. Met		Each
Zinc-Plated Carbon Steel


	2.5 mm to 8 mm Dia. in 20 mm to 63 mm Lengths	100	Plastic Box	ASME B18.8.200M	98350A300	000000