1mm Pins | McMaster-Carr

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	Cotter Pin Type Cotter Pin Type

	Standard

	For Hole Diameter For Hole Diameter

1mm

1-1.04mm

	Head Height Head Height

5mm

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61 Products

Dowel Pins

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. Some pins meet material and dimensional standards set by ASME, Mil. Spec., DIN, or ISO. DIN 6325-m6 is functionally equivalent to ISO 8734, with slight differences in hardness and length tolerances. ISO 2338-m6 is functionally equivalent to DIN 7, but the ends are chamfered instead of rounded.

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

Metric 52100 Alloy Steel

1 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	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	000000
5	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
8	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
10	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
12	0.002 to 0.008	Rockwell C58	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
16	0.002 to 0.008	Rockwell C58	Not Rated	DIN 6325-m6, ISO 8734	25	000000000	00000

Metric 18-8 Stainless Steel

1 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	ISO 2338-m6	100	000000000	000000
4	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
5	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
7	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
8	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
9	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
10	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
12	0 to 0.008	Not Rated	Not Rated	__	ISO 2338-m6	50	000000000	0000
14	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
16	0 to 0.008	Not Rated	Not Rated	__	ISO 2338-m6	50	000000000	0000
18	0 to 0.008	Not Rated	Not Rated	__	ISO 2338-m6	50	000000000	0000
20	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	50	000000000	0000
22	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
24	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000

Metric 316 Stainless Steel

1 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	ISO 2338-m6	10	000000000	000000
5	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	00000
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	00000
7	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
8	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	00000
9	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
10	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	00000
12	0 to 0.008	Not Rated	Not Rated	__	ISO 2338-m6	10	000000000	00000
14	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
16	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
18	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
20	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
22	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000
24	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	0000

Undersized Dowel Pins

Slip these pins in and out during maintenance or prototyping—they’re undersized to make alignment easier. Unlike standard pins, which fit tightly inside holes, these are designed to give you some wiggle room. Chamfered ends make them easier to insert. The breaking strength listed is double shear, which is the amount of force required to break a pin into three pieces.

18-8 stainless steel pins can be used in wet and humid environments without rusting, but they are not as strong as steel.

All metric pins meet ISO 2338-h8, which means they adhere to international standards for dimensions and tolerances.

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

Metric 18-8 Stainless Steel

1 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Specifications Met	Pkg. Qty.		Pkg.
4	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	000000000	000000
5	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	000000000	00000
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	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. Made of M2 tool steel, these pins are wear resistant and stay sharp at high temperatures.

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

		Head
Dia.	Dia. Tolerance	Dia.	Ht.	Min. Hardness		Each
M2 Tool Steel
63mm Lg.
1.000mm	0mm to 0.008mm	3mm	5mm	Rockwell C60	000000000	000000

Cotter Pins

Also known as split pins, these have one prong slightly longer than the other so they’re easy to open. Bend prongs outward to secure. Use them to secure the ends of clevis pins and shafts to keep components in place.

Steel pins have good strength. Pins with a zinc-plated finish have some corrosion resistance.

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

Metric Zinc-Plated 1050-1095 Spring Steel

1 mm Dia.
Lg., mm	Specifications Met	Pkg. Qty.		Pkg.
8	DIN 94, ISO 1234	200	000000000	00000
10	DIN 94, ISO 1234	200	000000000	0000
12	DIN 94, ISO 1234	200	000000000	00000
16	DIN 94, ISO 1234	200	000000000	0000
20	DIN 94, ISO 1234	200	000000000	0000
25	DIN 94, ISO 1234	200	000000000	00000

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. 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 mm Dia.
Lg., mm	For Hole Dia., mm	Wall Thick., mm	Min. Hardness	Breaking Strength, lbs.	Passivation	Specifications Met	Pkg. Qty.		Pkg.
4	1	0.2	Rockwell C42	150	Not Passivated	DIN 1481, ISO 8752	100	000000000	000000
6	1	0.2	Rockwell C42	150	Not Passivated	ISO 8752	100	000000000	0000
8	1	0.2	Rockwell C42	150	Not Passivated	ISO 8752	100	000000000	0000

Metric 18-8 Stainless Steel

End View

1 mm Dia.
Lg., mm	For Hole Dia., mm	Wall Thick., mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
4	1	0.2	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	00000
6	1	0.2	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	0000
8	1	0.2	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	0000

Coiled Spring Pins

End View

These spiral pins remain flexible after installation, so they absorb shock and vibration better than slotted spring pins. They work well in holes that are out of round. Use them for fastening, pivoting, and holding.

Squeeze pins closed and install them in a hole. Tension holds them tight against the hole wall. The chamfered ends aid insertion.

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

Steel pins offer good strength.

18-8 stainless steel pins resist corrosion better than 420 stainless steel pins. They may be mildly magnetic.

Passivated pins offer added protection against corrosion and oxidation.

Metric pins meet either ISO 8748 or ISO 8750 specifications.

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

Metric 1050-1095 Spring Steel
Lg.	For Hole Dia.	Min. Hardness	Breaking Strength, lbs.	Passivation	Specifications Met	Pkg. Qty.		Pkg.
1mm Dia.
4mm	1mm-1.04mm	Rockwell C43	130	Not Passivated	DIN 7343, ISO 8750	50	000000000	000000
6mm	1mm-1.04mm	Rockwell C43	130	Not Passivated	DIN 7343, ISO 8750	50	000000000	00000
Metric 18-8 Stainless Steel
1mm Dia.
4mm	1mm-1.04mm	Not Rated	100	Passivated	DIN 7343, ISO 8750	50	000000000	00000
6mm	1mm-1.04mm	Not Rated	100	Passivated	DIN 7343, ISO 8750	50	000000000	00000
10mm	1mm-1.04mm	Not Rated	100	Passivated	DIN 7343, ISO 8750	50	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.
1mm Dia.
2mm	-0.038mm to 0.038mm	MPP-1MM-2	0.5mm	25	000000000	000000
3mm	-0.038mm to 0.038mm	MPP-1MM-3	0.5mm	25	000000000	00000
4mm	-0.038mm to 0.038mm	MPP-1MM-4	0.5mm	25	000000000	00000
5mm	-0.038mm to 0.038mm	MPP-1MM-5	0.5mm	25	000000000	00000