8MM Clevis Pins | McMaster-Carr

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Diameter

Usable Length

Length

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Retaining Ring Groove

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Retaining Ring Groove

Material

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Sold As

Minimum Hardness

Through-Hole Diameter

2 mm

Performance

Corrosion Resistant

Tight Space

Cotter Pin Included

Hardness

Specifications Met

Export Control Classification Number (ECCN)

EAR99

REACH

Compliant

DFARS Specialty Metals

RoHS

For Maximum Cotter Pin Diameter

Groove Width

Passivation

Diameter at Extended Ball Height

9 mm

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Clevis Pins

The most commonly used clevis pins—just slide a cotter pin into the hole to secure parts. These pins have a flat, low-profile head to fit in tight spaces. They're less likely to get in the way than pins with a loop grip or T-handle but aren’t as easy to grab if you want to remove them frequently. Add your own cotter pin, or choose a clevis pin that includes a reusable hairpin cotter.

Steel

Cotter Pin Not

Included

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.

						Head, mm
	Usable Lg., mm	Dia. Tolerance, mm	For Max. Cotter Pin Dia., mm	Min. Hardness	Lg., mm	Dia.	Ht.	Pkg. Qty.		Pkg.
Zinc-Plated Carbon Steel







				8 mm Diameter

				15	-0.090 to 0.000	2	Rockwell B67	20	14	3	1	000000000	00000


				19	-0.090 to 0.000	2	Rockwell B67	24	14	3	1	000000000	0000
				20	-0.090 to 0.000	2	Rockwell B67	25	14	3	1	000000000	0000
				25	-0.090 to 0.000	2	Rockwell B67	30	14	3	1	000000000	0000
				30	-0.090 to 0.000	2	Rockwell B67	35	14	3	1	000000000	0000
				44	-0.090 to 0.000	2	Rockwell B67	50	14	3	1	000000000	0000

Corrosion-Resistant Stainless Steel

Cotter Pin Not

Included

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.

						Head, mm
	Usable Lg., mm	Dia. Tolerance, mm	For Max. Cotter Pin Dia., mm	Min. Hardness	Lg., mm	Dia.	Ht.		Each
18-8 Stainless Steel







				8 mm Diameter

				15	-0.050 to -0.010	2	Rockwell B80	20	14	3	000000000	00000


				25	-0.050 to -0.010	2	Rockwell B80	30	14	3	000000000	0000
				30	-0.050 to -0.010	2	Rockwell B80	35	14	3	000000000	0000
				44	-0.050 to -0.010	2	Rockwell B80	50	14	3	000000000	0000

Clevis Pins with Retaining Ring Groove

Insert the retaining ring into the groove for a secure hold that takes up less space than a cotter pin. The ring surrounds the entire pin, so bumps are unlikely to work these pins out of a hole.

Unlike most cotter pins, which install by hand, you will need retaining ring pliers to insert and remove the included ring.

Steel

					Head, mm
	Usable Lg., mm	Dia. Tolerance, mm	Min. Hardness	Lg., mm	Dia.	Ht.	Pkg. Qty.		Pkg.
Zinc-Plated Carbon Steel with Retaining Ring







				8 mm Diameter

				18	-0.090 to 0	Rockwell B63	20	14	3	5	000000000	00000


				23	-0.090 to 0	Rockwell B63	25	14	3	5	000000000	0000
				27	-0.090 to 0	Rockwell B63	30	14	3	5	000000000	0000
				33	-0.090 to 0	Rockwell B63	35	14	3	5	000000000	0000

Corrosion-Resistant Stainless Steel

					Head, mm
	Usable Lg., mm	Dia. Tolerance, mm	Min. Hardness	Lg., mm	Dia.	Ht.	Pkg. Qty.		Pkg.
18-8 Stainless Steel with Retaining Ring







				8 mm Diameter

				18	-0.090 to 0	Rockwell B70	20	14	3	5	000000000	000000


				23	-0.090 to 0	Rockwell B70	25	14	3	5	000000000	00000
				28	-0.090 to 0	Rockwell B70	30	14	3	5	000000000	00000
				33	-0.090 to 0	Rockwell B70	35	14	3	5	000000000	00000

Headless Clevis Pins with Retaining Ring Grooves

Secured with a retaining ring at either end, you can add and remove parts without having to take the pin all the way out. These pins are commonly used with rod ends, hydraulic cylinders, and other pivoting components. In addition to taking up less space than cotter pins, the retaining rings surround the entire pin, so bumps are unlikely to work it loose.

Unlike most cotter pins, which install by hand, you will need retaining ring pliers to insert and remove the included rings.

Steel

	Lg., mm		Each
Zinc-Plated Carbon Steel with Retaining Ring







	8 mm Diameter

	20	-0.050 to 0	Rockwell B80	28	000000000	000000


	24	-0.050 to 0	Rockwell B80	32	000000000	00000
	30	-0.050 to 0	Rockwell B80	38	000000000	00000
	40	-0.050 to 0	Rockwell B80	48	000000000	00000

Corrosion-Resistant Stainless Steel

	Lg., mm		Each
18-8 Stainless Steel with Retaining Ring







	8 mm Diameter

	20	-0.050 to 0	Rockwell B80	28	000000000	000000


	24	-0.050 to 0	Rockwell B80	32	000000000	00000
	30	-0.050 to 0	Rockwell B80	38	000000000	00000
	40	-0.050 to 0	Rockwell B80	48	000000000	00000

Flat-Head Quick-Release Pins

With no ring or handle to get caught on nearby components, these pins won’t pull out accidentally. The low profile makes them similar to basic clevis pins. Although the thin head fits in cramped spots, it also makes the pin harder to grab. A retaining ball holds pins in place once installed—pull to remove.

Steel

Image of Product. Front orientation. Contains Annotated. Quick-Release Pins. Flat-Head Quick-Release Pins.

			Head, mm
	Usable Lg., mm	Dia. at Extended Ball Ht., mm	Dia.	Ht.	Single Shear Breaking Strength	Min. Hardness	Ball Material	Pkg. Qty.		Pkg.
Zinc-Plated Carbon Steel







				8 mm Diameter

				12	9	14	3	Not Rated	Rockwell B60	Stainless Steel	5	000000000	00000


				17	9	14	3	Not Rated	Rockwell B60	Stainless Steel	5	000000000	0000
				22	9	14	3	Not Rated	Rockwell B60	Stainless Steel	5	000000000	0000
				42	9	14	3	Not Rated	Rockwell B60	Stainless Steel	5	000000000	0000