7/8" Dowel Pins | McMaster-Carr

Precisely align machine parts and prevent movement during assembly. These dowel pins are machined to tight tolerances and have a uniform diameter for a snug fit. They can also be used as a pivot, shaft, or hinge to join moving components. Since dowel pins can be hard to remove, they are best suited for permanent fixtures that don't require frequent adjustments or disassembly.

Steel

High-Strength Alloy Steel—Our strongest, most wear-resistant pins, these won't bend or break from vibration. Use them for high-stress applications, such as mounting and aligning hydraulic cylinders and injection molds. They perform best in dry environments since moisture will cause them to rust.

	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
High-Strength Alloy Steel







	7/8" Diameter

	7/8"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	98381A879	00000


	1"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	98381A880	0000
	1 1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	98381A881	0000
	2"	0.0001" to 0.0003"	120,000	Rockwell C47	ASME B18.8.2	1	98381A882	00000
	2 1/2"	0.0001" to 0.0003"	120,000	Rockwell C47	ASME B18.8.2	1	98381A883	00000
	3"	0.0001" to 0.0003"	120,000	Rockwell C47	ASME B18.8.2	1	98381A884	00000
	3 1/2"	0.0001" to 0.0003"	120,000	Rockwell C47	ASME B18.8.2	1	98381A886	00000
	4"	0.0001" to 0.0003"	120,000	Rockwell C47	ASME B18.8.2	1	98381A854	00000
	5"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	98381A889	00000
	6"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	98381A890	00000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments. In addition to resisting rust, these pins also withstand mild chemicals such as cleaners and degreasers. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.

High-Strength Machinable 416 Stainless Steel—These pins hold their shape under stress and friction from moving parts. In addition to being the strongest stainless steel alloy, 416 is also the most machinable, so you can shape these pins to fit your hole. However, they are the least corrosion-resistant stainless steel option.

	Min. Hardness	Mil. Spec.	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	7/8" Diameter

	1"	0" to 0.0002"	Not Rated	Not Rated	—	1	90145A211	000000


	1 1/2"	0" to 0.0002"	Not Rated	Not Rated	—	1	90145A212	00000
	2"	0" to 0.0002"	Not Rated	Not Rated	—	1	90145A213	00000


	High-Strength Machinable 416 Stainless Steel







					7/8" Diameter

					1"	0.0001" to 0.0003"	88,000	Rockwell C36	—	1	98380A760	00000


					3"	0.0001" to 0.0003"	88,000	Rockwell C36	MS16555-718	1	98380A764	00000

Corrosion-Resistant Stainless Steel with Material Certificate

Pins include a report with a traceable lot number and a description of their chemical, physical, and mechanical properties.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	Min. Hardness	Mil. Spec.	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	7/8" Diameter

	3"	0" to 0.0002"	Not Rated	Not Rated	—	1	90145A215	000000


	High-Strength Machinable 416 Stainless Steel







					7/8" Diameter

					2"	0.0001" to 0.0003"	88,000	Rockwell C36	—	1	98380A762	00000


					4"	0.0001" to 0.0003"	88,000	Rockwell C36	MS16555-722	1	98380A766	00000

Press-Fit Locating and Support Buttons

Support and position workpieces and fixtures from the bottom or side. These buttons press into a drilled hole for permanent installation. Also known as rest buttons.

			Stud		Tolerance
	Dia.	Lg.	Dia.	Lg.	Lg.	Stud Dia.		Each
Steel



		7/8"	1/4"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A411	00000


		7/8"	5/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A414	0000
		7/8"	3/8"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A416	00000
		7/8"	7/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A419	0000
		7/8"	1/2"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A421	0000
		7/8"	9/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A424	0000
		7/8"	5/8"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A425	0000
		7/8"	11/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A427	0000
		7/8"	3/4"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A428	0000
		7/8"	13/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A432	0000
		7/8"	7/8"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A434	0000


		7/8"	15/16"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A435	00000
		7/8"	1"	1/2"	5/8"	0" to 0.001"	-0.0005" to 0"	8511A436	0000

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

Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.

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
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
Carbon Steel







				7/8" Diameter

				1 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	2"	1 1/32"	5/16"	1	98306A241	00000


				2 3/16"	-0.009" to -0.004"	3/16"	Rockwell B63	2 1/2"	1 1/32"	5/16"	1	98306A243	0000
				2 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	3"	1 1/32"	5/16"	1	98306A593	0000
				3 3/16"	-0.009" to -0.004"	3/16"	Rockwell B63	3 1/2"	1 1/32"	5/16"	1	98306A252	0000
				3 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	4"	1 1/32"	5/16"	1	98306A595	0000
				4 3/16"	-0.009" to -0.004"	3/16"	Rockwell B63	4 1/2"	1 1/32"	5/16"	1	98306A312	0000
				4 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	5"	1 1/32"	5/16"	1	98306A347	0000
				5 3/16"	-0.009" to -0.004"	3/16"	Rockwell B63	5 1/2"	1 1/32"	5/16"	1	98306A368	0000
				5 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	6"	1 1/32"	5/16"	1	98306A416	00000
				6 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	7"	1 1/32"	5/16"	1	98306A425	00000


				Zinc-Plated Carbon Steel







								7/8" Diameter

								1 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	2"	1 1/32"	5/16"	1	97245A769	0000


								2 11/16"	-0.009" to -0.004"	3/16"	Rockwell B63	3"	1 1/32"	5/16"	1	97245A770	0000
								3 3/16"	-0.009" to -0.004"	3/16"	Rockwell B63	3 1/2"	1 1/32"	5/16"	1	97245A771	0000
								4 3/16"	-0.009" to -0.004"	13/64"	Rockwell B63	4 1/2"	1 1/32"	5/16"	1	97245A829	00000
								6 11/16"	-0.009" to -0.004"	13/64"	Rockwell B63	7"	1 1/32"	5/16"	1	97245A831	00000

SAE J493 Steel

Cotter Pin Not

Included

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

Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.

						Head
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
Carbon Steel







				7/8" Diameter

				1 7/8"	-0.009" to -0.004"	5/32"	Rockwell B63	2 1/4"	1 1/32"	5/16"	1	98340A190	00000

Heat-Treated Steel

Cotter Pin Not

Included

With additional hardness, these pins are less likely to bend, break, and wear than those that aren't heat treated.

Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. They perform best in dry environments since moisture will cause them to rust.

Galvanized Carbon Steel—These pins combine the strength of steel with the rust resistance of stainless steel. They're often used as an economical alternative to 18-8 stainless steel in wet and outdoor environments, but they won't hold up to salt water and chemicals.

						Head
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
Carbon Steel







				7/8" Diameter

				2 7/8"	-0.010" to 0.005"	3/16"	Rockwell C25	3 1/4"	1 1/4"	1/4"	1	96969A190	000000


				Galvanized Carbon Steel







								7/8" Diameter

								2 7/8"	-0.010" to 0.005"	3/16"	Rockwell C25	3 1/4"	1 1/4"	1/4"	1	96973A190	00000

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
	Usable Lg.	Dia. Tolerance	For Max. Cotter Pin Dia.	Min. Hardness	Lg.	Dia.	Ht.	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				7/8" Diameter

				2 11/16"	-0.009" to -0.004"	3/16"	Rockwell B80	3"	1 1/32"	5/16"	1	92390A592	000000


				3 11/16"	-0.009" to -0.004"	3/16"	Rockwell B80	4"	1 1/32"	5/16"	1	92390A594	00000

Alignment Pins

Line up holes by driving these pins through existing rivet, pin, and bolt holes in multiple pieces of metal. Alternatively known as lineup taper punches.

					Body
	Point Dia.	Taper Lg.	Dia.	Overall Lg.	Shape	Texture		Each
Steel



		1/2"	5 1/2"	7/8"	18"	Hex	Smooth	3420A8	000000

Ejector Sleeves

Use these sleeves with mold pins to form holes, bosses, and other features in parts, and then push the parts out of the mold. Made from H13 tool steel, these sleeves are strong, hard, and resist wear. They've been surface hardened with a process called nitriding, which adds even more strength and wear resistance. They’re precision ground to tight tolerances. Machining is not recommended.

					Head			4" Long		6" Long		8" Long
	ID	ID Tolerance	Dia.	Dia. Tolerance	Dia.	Ht.	Min. Hardness		Each		Each		Each
Nitride-Coated H13 Tool Steel



		5/8"	0" to 0.0005"	7/8"	-0.0008" to -0.0003"	1 1/8"	1/4"	Rockwell C65	90522A470	000000	90522A480	000000	90522A490	000000

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

Square-Retainer with

Hook Closure

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







	Square-Retainer with Hook Closure

	7/8"	5 1/2"	-0.016" to 0.016"	3 1/4"	Rockwell C22	7 3/8"	97143A670	000000


	7/8"	6 1/4"	-0.015" to 0.000"	3 1/4"	Rockwell B90	7 1/2"	97143A685	00000

Corrosion-Resistant Stainless Steel

Square-Retainer with

Hook Closure

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







	Square-Retainer with Hook Closure

	7/8"	5 1/2"	-0.016" to 0.016"	3 1/4"	Rockwell B75	7 5/16"	98480A660	000000

Ejector Pins

Also known as knockout and forged pins, use these pins to push parts out of molds. Pins are precision-ground to tight tolerances and hardened for strength and wear resistance. Machining is not recommended. Metric pins meet DIN 1530 specifications.

Nitride-Coated H13 Tool Steel

H13 tool steel pins resist rapid changes in temperature.

		Head
Dia.	Dia. Tolerance	Dia.	Ht.	Min. Hardness		Each







			6" Long

			7/8"	-0.0008" to -0.0003"	1 1/8"	1/4"	Rockwell C41	93772A546	000000




					10" Long

					7/8"	-0.0008" to -0.0003"	1 1/8"	1/4"	Rockwell C41	93772A556	00000

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.

Corrosion-Resistant Stainless Steel

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







				7/8" Diameter

				2 3/4"	-0.009" to 0.002"	Rockwell B80	3"	1"	1/4"	1	92735A262	000000


				3 3/4"	-0.009" to 0.002"	Rockwell B80	4"	1"	1/4"	1	92735A294	00000

Screw-Mount Locating and Support Buttons

Flat Head

Also known as rest buttons, these buttons support workpieces and fixtures from the bottom or side. Mount them onto a screw or stud extending from your jig or table.

Round—Round buttons have an unthreaded, counterbored through hole. Mount them to a socket head cap screw.

	Lg.	Lg. Tolerance	For Mounting Screw Size	Mounting Fasteners Included		Each
Steel—Round with Flat Head



	7/8"	1 1/8"	0" to 0.001"	5/16"	No	8506A111	00000

T-Handle Clevis Pins

With the widest grip, these pins give you the most leverage. They’re also the easiest to grab with gloved or slippery hands but take up the most space when installed. To secure, slide a cotter pin (not included) into the hole.

Steel

	Min. Hardness	Handle Color		Each
Black-Zinc-Plated Carbon Steel







	7/8" Diameter

	4"	-0.003" to 0.001"	1/4"	Rockwell B90	Black	91640A140	000000


	6"	-0.003" to 0.001"	1/4"	Rockwell B90	Black	91640A150	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

	7/8"	4 1/2"	-0.003" to 0.010"	3 1/8"	Rockwell C32	8"	91533A300	000000


	7/8"	6"	-0.003" to 0.010"	3 1/8"	Rockwell C32	10"	91533A350	00000

Loop-Grip Clevis Pins with Toggle

For components you need to lock in place but also disconnect frequently, these pins have a toggle end and large loop handle. No need for a separate cotter pin, the toggle swivels so you can insert into a hole and then swivels back to secure. Fold down the handle to save space when installed.

Steel

		Each
Zinc-Plated Carbon Steel







	7/8" Diameter

	3 1/2"	-0.003" to 0.001"	Rockwell B90	97141A660	000000


	6"	-0.003" to 0.001"	Rockwell B90	97141A665	00000

Tethered Loop-Grip Clevis Pins

A lanyard or chain prevents your pin from getting lost when removed. With a large loop handle that's easy to grip and pull, these clevis pins are often used for towing and other applications where you regularly secure and release components.

Steel


With Cotter Pin and Lanyard	With Cotter Pin and Lanyard	With Linch Pin and Chain

Painted Carbon Steel—Stronger than stainless steel, these pins won't deform from stress and vibration. The dark enamel creates a finished look but offers minimal corrosion resistance. They're best for dry environments.

Zinc-Yellow-Chromate-Plated Carbon Steel—With a more durable finish than clear zinc plating, these pins hold up in wet and outdoor environments although not as well as stainless steel. Because the plating resists wear and the steel holds up under stress, they're good for pivoting parts, like rod end linkages.

Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.

Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.

	Min. Hardness	Head Dia.	Handle Color		Each
Zinc-Plated Carbon Steel with Cotter Pin and Lanyard







	7/8" Diameter

	4 1/2"	-0.016" to 0.016"	3/16"	Rockwell C19	1 3/4"	—	98412A140	000000


	4 1/2"	-0.016" to 0.016"	3/16"	Rockwell C19	1 7/8"	Orange	92228A160	00000
	6"	-0.016" to 0.016"	3/16"	Rockwell C19	1 3/4"	—	98412A515	00000


	Zinc-Yellow-Chromate-Plated Carbon Steel with Cotter Pin and Lanyard







					7/8" Diameter

					7"	-0.012" to 0.000"	11/64"	Rockwell C28	1 7/16"	—	98412A235	00000


					Zinc-Yellow-Chromate-Plated Carbon Steel with Linch Pin and Chain







									7/8" Diameter

									7"	-0.012" to 0.000"	25/64"	Rockwell C28	1 1/2"	—	98497A666	00000


									Black-Painted Carbon Steel with Cotter Pin and Lanyard







													7/8" Diameter

													4"	-0.003" to 0.002"	17/64"	Rockwell C32	—	Red	91594A335	00000


													6 1/2"	-0.003" to 0.002"	17/64"	Rockwell C32	—	Red	91594A340	00000

Corrosion-Resistant Stainless Steel


With Cotter Pin and Lanyard	With Linch Pin and Chain

High-Strength 17-4 PH Stainless Steel—The strongest stainless steel pins we offer, these are the least likely to deform due to stress and vibration. Similar to 18-8 stainless steel, they're suitable for most wet and outdoor environments. However, they won't hold up to the harsh conditions and chemicals that 316 stainless steel can.

Cotter Pin Included—The hairpin cotter is quicker to install and remove than a linch pin but not as secure.

Linch Pin Included—Less likely to get knocked or shaken out of place than a hairpin, the linch pin has a ring that snaps down and locks.

	Min. Hardness	Head Dia.		Each
High-Strength 17-4 PH Stainless Steel with Cotter Pin and Lanyard







	7/8" Diameter

	6"	-0.016" to 0.016"	3/16"	Rockwell B80	1 3/4"	98412A474	000000


	High-Strength 17-4 PH Stainless Steel with Linch Pin and Chain







					7/8" Diameter

					6"	-0.016" to 0.016"	3/16"	Rockwell B80	1 3/4"	98497A410	00000