3/64" 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	Pkg. Qty.		Pkg.
High-Strength Alloy Steel







	3/64" Diameter

	1/4"	0.0001" to 0.0003"	Not Rated	Rockwell C60	5	98381A981	000000


	3/8"	0.0001" to 0.0003"	Not Rated	Rockwell C60	5	98381A982	00000
	1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C60	5	98381A983	00000
	3/4"	0.0001" to 0.0003"	Not Rated	Rockwell C60	5	98381A984	00000
	1"	0.0001" to 0.0003"	Not Rated	Rockwell C60	5	98381A985	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.

Highly Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant pins, these hold up in just about any environment. They won't degrade from exposure to weather, salt water, and most chemicals. Like 18-8 stainless steel, they're strong enough to join most components but won't withstand 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.

	Lg.	Dia. Tolerance	Double Shear Breaking Strength	Min. Hardness	Pkg. Qty.		Pkg.
18-8 Stainless Steel







				3/64" Diameter

				3/32"	0" to 0.0002"	Not Rated	Not Rated	5	90145A120	00000


				1/8"	0" to 0.0002"	Not Rated	Not Rated	5	90145A130	0000
				5/32"	0" to 0.0002"	Not Rated	Not Rated	5	90145A131	0000
				3/16"	0" to 0.0002"	Not Rated	Not Rated	5	90145A138	0000
				7/32"	0" to 0.0002"	Not Rated	Not Rated	5	90145A153	0000
				1/4"	0" to 0.0002"	Not Rated	Not Rated	5	90145A154	0000
				5/16"	0" to 0.0002"	Not Rated	Not Rated	5	90145A160	0000
				7/16"	0" to 0.0002"	Not Rated	Not Rated	5	90145A182	0000
				1/2"	0" to 0.0002"	Not Rated	Not Rated	5	90145A183	0000
				5/8"	0" to 0.0002"	Not Rated	Not Rated	5	90145A185	0000
				7/8"	0" to 0.0002"	Not Rated	Not Rated	5	90145A196	00000


				1"	0" to 0.0002"	Not Rated	Not Rated	5	90145A206	00000


				Highly Corrosion-Resistant 316 Stainless Steel







								3/64" Diameter

								3/32"	0" to 0.0002"	Not Rated	Not Rated	5	97395A175	0000


								1/8"	0" to 0.0002"	Not Rated	Not Rated	5	97395A196	0000
								7/32"	0" to 0.0002"	Not Rated	Not Rated	5	97395A204	0000
								5/16"	0" to 0.0002"	Not Rated	Not Rated	5	97395A210	0000
								3/8"	0" to 0.0002"	Not Rated	Not Rated	5	97395A223	0000
								7/16"	0" to 0.0002"	Not Rated	Not Rated	5	97395A224	0000
								1/2"	0" to 0.0002"	Not Rated	Not Rated	5	97395A230	00000
								5/8"	0" to 0.0002"	Not Rated	Not Rated	5	97395A236	00000
								3/4"	0" to 0.0002"	Not Rated	Not Rated	5	97395A237	00000
								1"	0" to 0.0002"	Not Rated	Not Rated	5	97395A241	00000


								High-Strength Machinable 416 Stainless Steel







												3/64" Diameter

												3/32"	0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A168	0000


1/8"												0.0001" to 0.0003"	Not Rated	Rockwell C36	1	98380A170	0000
5/32"	0.0001" to 0.0003"											Not Rated	Rockwell C36	1	98380A173	0000
3/16"	0.0001" to 0.0003"											Not Rated	Rockwell C36	1	98380A177	0000
7/32"	0.0001" to 0.0003"											Not Rated	Rockwell C36	1	98380A186	0000
1/4"	0.0001" to 0.0003"											Not Rated	Rockwell C36	25	98380A311	00000
5/16"	0.0001" to 0.0003"	Not Rated										Rockwell C36	1	98380A188	0000
3/8"	0.0001" to 0.0003"	Not Rated	Rockwell C36									1	98380A195	0000
7/16"	0.0001" to 0.0003"	Not Rated	Rockwell C36									1	98380A223	0000
1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C36									5	98380A401	00000
5/8"	0.0001" to 0.0003"	Not Rated	Rockwell C36									1	98380A228	0000


3/4"	0.0001" to 0.0003"	Not Rated	Rockwell C36									5	98380A403	00000
1"	0.0001" to 0.0003"	Not Rated	Rockwell C36									1	98380A239	0000

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	Pkg. Qty.		Pkg.
18-8 Stainless Steel







	3/64" Diameter

	3/8"	0" to 0.0002"	Not Rated	Not Rated	5	90145A161	00000


	3/4"	0" to 0.0002"	Not Rated	Not Rated	5	90145A190	0000


	Highly Corrosion-Resistant 316 Stainless Steel







					3/64" Diameter

					5/32"	0" to 0.0002"	Not Rated	Not Rated	5	97395A197	0000


					3/16"	0" to 0.0002"	Not Rated	Not Rated	5	97395A203	0000
					1/4"	0" to 0.0002"	Not Rated	Not Rated	5	97395A209	0000

Plastic Dowel Pins

Assemble circuit boards and other electronic parts with dowel pins that insulate against stray current. These pins prevent short circuits and electromagnetic interference (EMI) that can harm performance and cause malfunctions. They’re also lighter than metal pins if you need to reduce weight in prototypes and moving assemblies. Dowel pins are machined to tight tolerances and have a uniform diameter for a snug fit. Since they can be hard to remove, they are best for fixtures that don't need to be adjusted or taken apart frequently.

Plastic

Wear-Resistant Acetal—Slippery and wear resistant, these pins make excellent pivots. They're often used for automated machinery and other moving parts that create a lot of friction. They also prevent short circuits better than PEEK and polycarbonate plastic.

Impact-Resistant Polycarbonate—Our most impact-resistant plastic pins, these resist cracking when inserted into tight holes. They are also clear to be less noticeable in your assembly.

High-Strength PEEK—The closest alternative to metal pins, these offer the best strength to stand up to stress and vibration. In addition, they won't degrade or lose their shape when exposed to high heat. They aren't very impact resistant, however, and may crack if inserted too forcefully.

	Min. Temp., ° F	Max. Temp., ° F	Color	Pkg. Qty.		Pkg.
Wear-Resistant Acetal







	3/64" Diameter

	1/8"	-0.005" to 0.005"	Rockwell M80	Not Rated	220	White	50	97155A106	00000


	1/4"	-0.005" to 0.005"	Rockwell M80	Not Rated	220	White	50	97155A109	0000
	3/8"	-0.005" to 0.005"	Rockwell M80	Not Rated	220	White	50	97155A112	0000
	1/2"	-0.005" to 0.005"	Rockwell M80	Not Rated	220	White	50	97155A115	0000


	Impact-Resistant Polycarbonate







					3/64" Diameter

					1/8"	-0.005" to 0.005"	Rockwell R118	-40	210	Clear	10	92078A200	0000


					1/4"	-0.005" to 0.005"	Rockwell R118	-40	210	Clear	10	92078A201	0000
					3/8"	-0.005" to 0.005"	Rockwell R118	-40	210	Clear	10	92078A202	0000
					1/2"	-0.005" to 0.005"	Rockwell R118	-40	210	Clear	10	92078A203	0000


					High-Strength PEEK







									3/64" Diameter

									1/8"	-0.005" to 0.005"	Rockwell M126	-50	500	Beige	10	91962A200	0000


									1/4"	-0.005" to 0.005"	Rockwell M126	-50	500	Beige	10	91962A201	0000
									3/8"	-0.005" to 0.005"	Rockwell M126	-50	500	Beige	10	91962A202	0000
									1/2"	-0.005" to 0.005"	Rockwell M126	-50	500	Beige	10	91962A203	00000

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







			4" Long

			3/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C41	93772A523	00000




					6" Long

					3/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C41	93772A104	0000

Coiled Spring Pins

End View

The best spring pins for joining parts exposed to vibration and shock. They're often used in power transmission, automation, and other assemblies with constant motion and sudden starts and stops. Because of their spiral shape, they flex to conform to holes that aren’t perfectly round.

Corrosion-Resistant 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.

Wear-Resistant 400 Series Stainless Steel—Our most wear-resistant stainless steel pins, these are good for pivoting parts that create a lot of friction. They hold up in environments that experience occasional moisture, but they're not as corrosion resistant as 18-8 and 316 stainless steel.

	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Corrosion-Resistant 18-8 Stainless Steel







	3/64" Diameter

	1/8"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A131	00000


	3/16"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A110	0000
	1/4"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A115	0000
	3/8"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A120	0000
	1/2"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A125	0000
	5/8"	0.047" to 0.048"	Not Rated	Not Rated	ASME B18.8.2	25	98195A132	0000


	Wear-Resistant 400 Series Stainless Steel







					3/64" Diameter

					1/8"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	50	93740A070	00000


					3/16"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	50	93740A072	0000
					1/4"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	50	93740A074	00000
					3/8"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	50	93740A076	00000
					1/2"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	50	93740A078	00000
					5/8"	0.047" to 0.048"	190	Rockwell C46	ASME B18.8.2	25	93740A080	0000

Core Pins

Mold plastic around these pins to form small holes, or use them to perforate parts. They have a flat head to fit into a counterbored hole. Pins can be machined to fit your application. They're precision-ground to tight tolerances.

M2 High-Speed Tool Steel About M2 High-Speed Tool Steel

M2 high-speed tool steel pins resist wear and stay sharp at high temperatures.

			Head				Each
	Dia.	Dia. Tolerance	Dia.	Ht.	Min. Hardness		1-9	10-99	100-Up
2 1/2" Long



		3/64"	0" to 0.0002"	3/32"	3/32"	Rockwell C60	98378A918	00000	00000	00000

Shoulder-Style Ejector Pins

A thick shoulder underneath the head makes these pins more rigid than standard ejector pins. Also known as knockout and forged pins, use them to push parts out of molds. They're precision-ground to tight tolerances and hardened for strength and wear resistance. Machining is not recommended.

Pins are made of H13 tool steel to resist rapid changes in temperature.

Nitride-Coated H13 Tool Steel

				Head
	Dia.	Dia. Tolerance	Shoulder Dia.	Dia.	Ht.	Min. Hardness		Each
1/2" Long Shoulder







				6" Long

				3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A121	00000




						10" Long

						3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A228	0000


						2" Long Shoulder







										6" Long

										3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A126	0000




												10" Long

												3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A333	0000


												3" Long Shoulder







																10" Long

																3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A103	0000


																4" Long Shoulder







																				10" Long

																				3/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	93779A104	0000

Flush Mount-Head Core Pins

A 60° beveled head fits into a countersunk hole. Mold plastic around these pins to form small holes, or use them to perforate parts. Also known as perforator, mold, forged, quill, and pilot pins, they can be machined to fit your application. Pins are precision-ground to tight tolerances.

M2 High-Speed Tool Steel About M2 High-Speed Tool Steel

M2 high-speed tool steel pins resist wear and stay sharp at high temperatures.

			Head
	Dia.	Dia. Tolerance	Dia.	Ht.	Min. Hardness	Countersink Angle		Each
2 1/2" Long



		3/64"	0" to 0.0003"	0.084"	0.033"	Rockwell C60	60°	93757A451	00000

Through-Hardened Ejector Pins

Compared to standard ejector pins, these pins are less likely to chip and crack when used to push steel parts out of molds because they've been hardened through their core. However, they cannot be drilled or tapped and are more brittle than standard ejector pins. They're also known as knockout and forged pins. Made of H13 tool steel, they resist rapid changes in temperature. They’re precision ground to tight tolerances.

Nitride-Coated H13 Tool Steel

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







			6" Long

			3/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C50	4433N101	00000