5/64" 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	Specs. Met	Pkg. Qty.		Pkg.
High-Strength Alloy Steel







	5/64" Diameter

	1/8"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	000000


	5/32"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	00000
	3/16"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	7/32"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	00000
	1/4"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	5/16"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	00000
	3/8"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	5/8"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	0000
	3/4"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	7/8"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000


	1"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000
	1 1/2"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	1	000000000	0000

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.

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







			5/64" Diameter

			3/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000


			1/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	0000
			5/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			3/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			7/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			1/4"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			5/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			3/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			7/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			1/2"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			5/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000


			3/4"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			7/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			1"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
			1 1/2"	0" to 0.0002"	Not Rated	Not Rated	1	000000000	0000


			Highly Corrosion-Resistant 316 Stainless Steel







							5/64" Diameter

							3/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	0000


							1/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	0000
							5/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	0000
							3/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	0000
							7/32"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							1/4"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							3/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							7/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							1/2"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							5/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							3/4"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000


							7/8"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							1"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000
							1 1/2"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	00000


							High-Strength Machinable 416 Stainless Steel







									5/64" Diameter

	1/8"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	0000


	3/16"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	0000
	1/4"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	5/16"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	3/8"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	7/16"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	1/2"	0.0001" to 0.0003"							700	Rockwell C36	5	000000000	0000
	5/8"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	3/4"	0.0001" to 0.0003"							Not Rated	Rockwell C36	5	000000000	00000
	1"	0.0001" to 0.0003"							700	Rockwell C36	5	000000000	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	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel







	5/64" Diameter

	5/16"	0" to 0.0002"	Not Rated	Not Rated	5	000000000	000000


	High-Strength Machinable 416 Stainless Steel







					5/64" Diameter

					3/32"	0.0001" to 0.0003"	Not Rated	Rockwell C36	5	000000000	00000


					7/32"	0.0001" to 0.0003"	Not Rated	Rockwell C36	5	000000000	0000
					7/8"	0.0001" to 0.0003"	Not Rated	Rockwell C36	5	000000000	00000

Steel with Material Certificate

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

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







	5/64" Diameter

	7/16"	0.0001" to 0.0003"	Not Rated	Rockwell C50	ASME B18.8.2	5	000000000	000000

Slotted Spring Pins


	End View

Squeeze these pins into holes and they expand slightly, creating tension to hold parts in place. They are often used as hinge pins and as fasteners for springs and power transmission components. An alternative to dowel pins, they're lighter in weight with a hollow center and don’t need a precise hole. Also known as roll pins.

Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.

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.

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.

	For Hole Dia.	Wall Thk.	Double Shear Breaking Strength, lbf	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







			5/64" Diameter

			3/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	000000


			1/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			5/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			3/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	0000
			7/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			1/2"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			9/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			5/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			11/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			3/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			13/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000


			7/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			1"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			1 1/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
			1 1/2"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000


			Zinc-Plated Spring Steel







							5/64" Diameter

							3/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000


							1/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							5/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							3/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							7/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							1/2"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							9/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							5/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							11/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							3/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							13/16"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000


							7/8"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							1"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							1 1/4"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000
							1 1/2"	0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	250	000000000	00000


							Corrosion-Resistant 18-8 Stainless Steel







	5/64" Diameter

	3/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000


	1/4"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000
	5/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000
	3/8"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000
	7/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000
	1/2"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	0000
	9/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000
	11/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000
	3/4"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000
	13/16"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000
	7/8"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000


	1 1/4"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000
	1 1/2"	0.078" to 0.081"							0.018"	450	Not Rated	ASME B18.8.2	100	000000000	00000


	Wear-Resistant 400 Series Stainless Steel







				5/64" Diameter

				3/16"						0.078" to 0.081"	0.018"	800	Rockwell C43	ASME B18.8.2	100	000000000	00000


				1/4"	0.078" to 0.081"					0.018"	800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				5/16"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				3/8"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				7/16"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				1/2"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				9/16"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	50	000000000	00000
				5/8"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				11/16"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				3/4"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	50	000000000	00000
				13/16"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	50	000000000	00000


				7/8"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				1"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	50	000000000	00000
				1 1/4"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	100	000000000	00000
				1 1/2"	0.078" to 0.081"	0.018"				800	Rockwell C43	ASME B18.8.2	50	000000000	00000

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



		5/64"	0" to 0.0002"	1/8"	3/32"	Rockwell C60	000000000	00000	00000	00000


		4" Long



				5/64"	0" to 0.0003"	1/8"	3/32"	Rockwell C60	000000000	00000	00000	00000


				6" Long



						5/64"	0" to 0.0003"	1/8"	3/32"	Rockwell C60	000000000	00000	00000	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







			6" Long

			5/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C41	000000000	00000




					10" Long

					5/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C41	000000000	0000

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

				5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	00000




						10" Long

						5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	0000


						2" Long Shoulder







										6" Long

										5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	0000




												10" Long

												5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	0000


												3" Long Shoulder







																10" Long

																5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	0000


																4" Long Shoulder







																				10" Long

																				5/64"	-0.0008" to -0.0005"	1/8"	1/4"	1/8"	Rockwell C41	000000000	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.

Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.

	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







	5/64" Diameter

	5/16"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	00000


	3/8"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	0000
	1/2"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	0000
	5/8"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	0000
	3/4"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	0000
	1"	0.077" to 0.081"	550	Rockwell C42	ASME B18.8.2	100	000000000	0000


	Wear-Resistant 400 Series Stainless Steel







					5/64" Diameter

					5/16"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	00000


					3/8"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	00000
					1/2"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	00000
					5/8"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	00000
					3/4"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	00000
					1"	0.077" to 0.081"	550	Rockwell C46	ASME B18.8.2	50	000000000	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

			5/64"	-0.0008" to -0.0005"	1/4"	1/8"	Rockwell C50	00000000	00000

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



		5/64"	0" to 0.0003"	0.141"	0.055"	Rockwell C60	60°	000000000	00000


		6" Long



				5/64"	0" to 0.0003"	0.141"	0.055"	Rockwell C60	60°	000000000	00000