McMaster-Carr

Use dowel pins as pivots, hinges, shafts, jigs, and fixtures to locate or hold parts. For a tight fit, your hole should be equal to or slightly smaller than the diameter shown. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces.

Steel pins are the strongest dowel pins. Steel pins are precision ground except for 1/32" diameter pins. Stainless steel pins are more corrosion resistant than steel pins. Pins that are passivated offer added protection against corrosion and oxidation. Stainless steel pins are precision ground except for 1/64" diameter pins. 18-8 stainless steel pins offer a balance of strength and corrosion resistance. They may be mildly magnetic. 316 stainless steel pins have the best corrosion resistance of our stainless steel pins. They may be mildly magnetic.

Metric pins meet either DIN 6325-m6 specifications for steel pins or ISO 2338-m6 specifications for stainless steel pins. DIN 6325-m6 is functionally equivalent to DIN EN ISO 8734, with slight differences in hardness and length tolerances.

DIN 7 is no longer an active specification and is superseded by ISO 2338-m6. They are functionally equivalent with slight differences in length and the pin ends. DIN 7 has rounded ends where ISO 2338-m6 has chamfered ends.

For technical drawings and 3-D models, click on a part number.

Metric 4140 Alloy Steel

1.5 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Specifications Met	Pkg. Qty.		Pkg.
7	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, DIN EN ISO 8734	5	000000000	00000
9	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, DIN EN ISO 8734	5	000000000	0000

Metric 52100 Alloy Steel

1.5 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met	Pkg. Qty.		Pkg.
4	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	25	000000000	00000
5	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	0000
6	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
8	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
10	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	0000
12	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	0000
14	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
16	0.002 to 0.008	Rockwell C52	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
18	0.002 to 0.008	Rockwell C58	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
20	0.002 to 0.008	Rockwell C58	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
22	0.002 to 0.008	Rockwell C58	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000
24	0.002 to 0.008	Rockwell C58	400	DIN 6325-m6, DIN EN ISO 8734	50	000000000	00000

Metric 18-8 Stainless Steel

1.5 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
3	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	000000
4	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
5	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
7	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
8	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
9	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
10	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
12	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
14	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	100	000000000	00000
16	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	0000
18	0 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	0000
20	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	0000
22	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
24	0 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	25	000000000	0000

Metric 316 Stainless Steel

1.5 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
4	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	000000
5	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
7	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
8	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
9	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
10	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
12	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
14	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
16	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	50	000000000	00000
18	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
20	0 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
22	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000
24	0.002 to 0.008	Not Rated	Not Rated	Passivated	DIN 7, ISO 2338-m6	5	000000000	0000

Slotted Spring Pins

Also known as roll, tension, split, and expansion pins, these pins have a slot along one side that you squeeze closed to install them into unthreaded holes. Once installed, they expand slightly, creating outward tension that holds them tight against the hole wall. These pins absorb shock and vibration in your system, and keep parts from loosening. They are often used as hinge pins, or to hold springs and power transmission components in place.

Install these pins into a hole slightly smaller than the pin diameter. They have at least one chamfered end, which means the end is angled to make insertion easier.

Breaking strength is measured as double shear, which is the amount of force required to break a pin into three pieces.

Some metric pins with the same diameter come in two different wall thicknesses. Thinner walls are more flexible, easier to install, and won’t weigh down your assembly as much as thicker pins. Layer a pin with a thin wall inside a pin with a thicker wall to increase the breaking strength. Make sure the slots are opposite one another for maximum strength.

Steel pins are strong and wear resistant.

18-8 stainless steel pins offer a balance of strength and corrosion resistance.

Pins that meet specifications for ISO 8752 (formerly DIN 1481) or ISO 13337 (formerly DIN 7346) adhere to international standards for pin dimensions.

For technical drawings and 3-D models, click on a part number.

Metric 1050-1095 Spring Steel

End View

1.5 mm Dia.
Lg., mm	For Hole Dia., mm	Wall Thick., mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met	Pkg. Qty.		Pkg.
4	1.5-1.6	0.3	Rockwell C42	350	DIN 1481, ISO 8752	100	000000000	000000
5	1.5-1.6	0.3	Rockwell C42	350	DIN 1481, ISO 8752	100	000000000	0000
6	1.5-1.6	0.3	Rockwell C42	350	DIN 1481, ISO 8752	100	000000000	0000
8	1.5-1.6	0.3	Rockwell C42	350	DIN 1481, ISO 8752	100	000000000	0000
10	1.5-1.6	0.3	Rockwell C42	350	ISO 8752	100	000000000	0000
12	1.5-1.6	0.3	Rockwell C42	350	DIN 1481, ISO 8752	100	000000000	0000

Metric 18-8 Stainless Steel

End View

1.5 mm Dia.
Lg., mm	For Hole Dia., mm	Wall Thick., mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
4	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	00000
5	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	0000
6	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	25	000000000	0000
8	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	25	000000000	0000
10	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	25	000000000	0000
12	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	25	000000000	0000

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.

M2 tool steel pins withstand high temperatures.

Metric pins meet DIN 1530 specifications.

For technical drawings and 3-D models, click on a part number.

Metric M2 Tool Steel

		Head
Dia., mm	Dia. Tolerance, mm	Dia., mm	Ht., mm	Min. Hardness		Each
100 mm Lg.
1.5000	-0.008 to -0.002	3	1.5	Rockwell C60	000000000	00000
125 mm Lg.
1.5000	-0.008 to -0.002	3	1.5	Rockwell C60	000000000	0000
160 mm Lg.
1.5000	-0.008 to -0.002	3	1.5	Rockwell C60	000000000	0000
200 mm Lg.
1.5000	-0.008 to -0.002	3	1.5	Rockwell C60	000000000	00000

Captive Pins

Also known as pilot pins, use these pins to position, pivot, and align components. To install, punch or drill a hole in sheet metal, then use a punch and anvil or arbor press to clinch the head to the metal.

Pins are passivated for added protection against corrosion and oxidation. The ends are chamfered for easy insertion.

PEM® MPP pins work with most materials. Made of A286 stainless steel, they're our strongest captive pins, with corrosion resistance comparable to 18-8 stainless steel pins. They are nonmagnetic.

For technical drawings and 3-D models, click on a part number.

Metric A286 Stainless Steel
Lg.	Dia. Tolerance	PEM® Part No.	For Min. Panel Thick.	Pkg. Qty.		Pkg.
1.5mm Dia.
3mm	-0.038mm to 0.038mm	MPP-1.5MM-3	0.5mm	25	000000000	000000
4mm	-0.038mm to 0.038mm	MPP-1.5MM-4	0.5mm	25	000000000	00000
5mm	-0.038mm to 0.038mm	MPP-1.5MM-5	0.5mm	25	000000000	00000
6mm	-0.038mm to 0.038mm	MPP-1.5MM-6	0.5mm	25	000000000	00000
8mm	-0.038mm to 0.038mm	MPP-1.5MM-8	0.5mm	25	000000000	00000

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