6mm Pins | McMaster-Carr

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Drive Style Drive Style

	Slotted

Forward

How can we improve?

71 Products

About Threaded Studs and Rods

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. 416 stainless steel pins are more wear resistant than other stainless pins, but not as corrosion resistant. They are 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 4140 Alloy Steel

5 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Specifications Met	Pkg. Qty.		Pkg.
6	0.004 to 0.012	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	5	000000000	00000
6 mm Dia.
6	0.004 to 0.012	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	5	000000000	0000

Metric 52100 Alloy Steel

1 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met	Pkg. Qty.		Pkg.
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	000000
1.5 mm Dia.
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
2 mm Dia.
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
2.5 mm Dia.
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000
3 mm Dia.
6	0.002 to 0.008	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	100	000000000	00000
4 mm Dia.
6	0.004 to 0.012	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	50	000000000	00000

Metric 18-8 Stainless Steel

0.8 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	000000
1 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
1.5 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
2 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	100	000000000	00000
2.5 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	50	000000000	0000
3 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	50	000000000	00000
4 mm Dia.
6	0.004 to 0.012	Not Rated	Not Rated	Passivated	ISO 2338-m6	50	000000000	00000
5 mm Dia.
6	0.004 to 0.012	Not Rated	Not Rated	Passivated	ISO 2338-m6	25	000000000	0000
6 mm Dia.
6	0 to 0.012	Not Rated	Not Rated	__	ISO 2338-m6	10	000000000	0000

Metric 316 Stainless Steel

0.8 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Passivation	Specifications Met	Pkg. Qty.		Pkg.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	5	000000000	00000
1 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	00000
1.5 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	50	000000000	00000
2 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	25	000000000	0000
2.5 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	25	000000000	0000
3 mm Dia.
6	0.002 to 0.008	Not Rated	Not Rated	Passivated	ISO 2338-m6	25	000000000	0000
4 mm Dia.
6	0.004 to 0.012	Not Rated	Not Rated	Passivated	ISO 2338-m6	10	000000000	0000
5 mm Dia.
6	0 to 0.012	Not Rated	Not Rated	__	ISO 2338-m6	5	000000000	0000
6 mm Dia.
6	0.004 to 0.012	Not Rated	Not Rated	Passivated	ISO 2338-m6	1	000000000	0000

Metric 416 Stainless Steel

2mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Passivation	Pkg. Qty.		Pkg.
6	0.002 to 0.009	Rockwell C36	Not Rated	Not Passivated	5	000000000	00000
2.5mm Dia.
6	0.002 to 0.009	Rockwell C36	Not Rated	Not Passivated	5	000000000	0000
3mm Dia.
6	0.004 to 0.012	Rockwell C36	Not Rated	Not Passivated	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.

Steel pins are very strong. They are best for dry environments.

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 12L14 Carbon Steel

2 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Specifications Met	Pkg. Qty.		Pkg.
6	-0.014 to 0	Rockwell B68	Not Rated	ISO 2338-h8	100	000000000	00000
3 mm Dia.
6	-0.014 to 0	Rockwell B68	Not Rated	ISO 2338-h8	100	000000000	00000

Metric 18-8 Stainless Steel

1 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength	Specifications Met	Pkg. Qty.		Pkg.
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	000000000	000000
1.5 mm Dia.
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	50	000000000	0000
2 mm Dia.
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	000000000	00000
2.5 mm Dia.
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	50	000000000	0000
3 mm Dia.
6	-0.014 to 0	Rockwell B95	Not Rated	ISO 2338-h8	100	000000000	00000
4 mm Dia.
6	-0.018 to 0	Rockwell B95	Not Rated	ISO 2338-h8	25	000000000	0000

Half-Groove Dowel Pins

Dowel Pin with Tapered Groove

These pins make good hinges or pivots. The grooves pinch shut when pressed into a hole, creating tension and holding the pin in place. The grooved half locks pins in position, while the smooth half acts as a pivot. For the best fit, the hole should be equal to or slightly larger than the diameter shown. The ends are chamfered for easy insertion. Pins are made of zinc-plated steel for good strength and some corrosion resistance. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces. Also known as type H pins.

Tapered pins are good when part of the assembly must be a free fit.

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

Dowel Pins with Tapered Groove—Zinc-Plated12L13 Carbon Steel
Lg.	Dia. (A)	Dia. (A) Tolerance	Dia. (B)	Dia. (B) Tolerance	Groove Lg.	Breaking Strength, lbs.	Specifications Met	Pkg. Qty.		Pkg.
2.5mm Dia.
6mm	2.5mm	-0.025mm to 0mm	2.7mm	-0.05mm to 0.05mm	3mm	950	ISO 8745	10	000000000	00000
3mm Dia.
6mm	3mm	-0.025mm to 0mm	3.2mm	-0.05mm to 0.05mm	3mm	1,400	ISO 8745	10	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. 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.

Passivated pins offer added protection against corrosion and oxidation.

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.
6	1	0.2	Rockwell C42	150	Not Passivated	ISO 8752	100	000000000	00000
1.5 mm Dia.
6	1.5-1.6	0.3	Rockwell C42	350	Not Passivated	DIN 1481, ISO 8752	100	000000000	00000
2 mm Dia.
6	2	0.2	Rockwell C42	330	Not Passivated	DIN 7346, ISO 13337	100	000000000	0000
6	2-2.1	0.4	Rockwell C42	600	Not Passivated	ISO 8752	200	000000000	00000
2.5 mm Dia.
6	2.5	0.25	Rockwell C42	530	Not Passivated	DIN 7346, ISO 13337	100	000000000	00000
3 mm Dia.
6	3	0.3	Rockwell C42	780	Not Passivated	DIN 7346, ISO 13337	100	000000000	0000
6	3-3.1	0.6	Rockwell C42	1,400	Not Passivated	ISO 8752	200	000000000	00000
4 mm Dia.
6	4	0.5	Rockwell C42	1,700	Not Passivated	DIN 7346, ISO 13337	100	000000000	00000
6	4-4.2	0.8	Rockwell C42	2,500	Not Passivated	ISO 8752	100	000000000	0000
5 mm Dia.
6	5	0.5	Rockwell C42	2,300	Not Passivated	DIN 7346, ISO 13337	50	000000000	00000

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.
6	1	0.2	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	00000
1.5 mm Dia.
6	1.5-1.6	0.3	Not Rated	Not Rated	Not Passivated	ISO 8752	25	000000000	00000
2 mm Dia.
6	2-2.1	0.4	Not Rated	Not Rated	Passivated	DIN 1481, ISO 8752	25	000000000	0000
3 mm Dia.
6	3-3.1	0.6	Not Rated	Not Rated	Not Passivated	ISO 8752	100	000000000	0000
4 mm Dia.
6	4-4.2	0.8	Not Rated	Not Rated	Passivated	DIN 1481, ISO 8752	10	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.
6mm	1mm-1.04mm	Rockwell C43	130	Not Passivated	DIN 7343, ISO 8750	50	000000000	000000
1.5mm Dia.
6mm	1.5mm-1.6mm	Rockwell C43	320	Not Passivated	ASME B18.8.3M, DIN 7343, ISO 8750	50	000000000	00000
2mm Dia.
6mm	2mm-2.1mm	Rockwell C43	550	Not Passivated	ASME B18.8.3M, DIN 7343, ISO 8750	50	000000000	0000
Metric 18-8 Stainless Steel
1mm Dia.
6mm	1mm-1.04mm	Not Rated	100	Passivated	DIN 7343, ISO 8750	50	000000000	00000
1.5mm Dia.
6mm	1.5mm-1.6mm	Not Rated	200	Passivated	ASME B18.8.3M, DIN 7343, ISO 8750	25	000000000	0000
2mm Dia.
6mm	2mm-2.1mm	Not Rated	400	Passivated	ASME B18.8.3M, 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.
1.5mm Dia.
6mm	-0.038mm to 0.038mm	MPP-1.5MM-6	0.5mm	25	000000000	000000
2mm Dia.
6mm	-0.038mm to 0.038mm	MPP-2MM-6	0.5mm	25	000000000	00000

Metric Partially Threaded Studs

Screw the threaded end of these metric studs into a tapped hole and use the unthreaded end as a pivot point, hinge, shaft, or locator pin. All can be installed and adjusted by hand or with a slotted screwdriver. These studs are steel for strength and wear resistance. They’re best for dry environments, since moisture will cause them to rust. All meet ISO 2342 (formerly DIN 427), an international standard for fastener dimensions.

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

		Shaft
Lg., mm	Thread Lg., mm	Lg., mm	Dia., mm	Dia. Tolerance, mm	Tensile Strength	Hardness	Drive Style	Specifications Met	Pkg. Qty.		Pkg.
Steel
M3 × 0.5 mm
6	3.6	2.4	3	-0.14 to 0	Not Rated	Rockwell B75	Slotted	DIN 427, ISO 2342	25	000000000	00000

Weld Studs

Projections Above the Head

These studs have a wide base that distributes the load and projections that concentrate the weld. Length listed is overall length.

Choose studs with above-head projection to weld the screw directly to the surface of the material for a smoother appearance.

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

	Base
Lg.	Dia.	Thick.	Tensile Strength, psi	Projection Location	Hardness	Pkg. Qty.		Pkg.
Steel
M4
6mm	8mm	1.2mm	Not Rated	Above Head	Not Rated	10	000000000	00000

Steel Press-Fit Studs

These steel studs are zinc plated to resist corrosion in wet environments. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.

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

Metric Zinc-Plated Steel
Lg., mm	Thread Pitch, mm	PEM® Part Number	Thread Lg., mm	Drill Bit Size	For Min. Material Thick., mm	For Min. Lg. Between Hole Center and Sheet Edge, mm	For Hole Dia., mm	Hole Size Tolerance, mm	Base Dia., mm	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
M2.5
6	0.45	FH-M2.5-6	4	No. 40	1.000	5.5	2.5	0.000 to 0.08	4.5	Not Rated	Not Rated	50	000000000	000000
M3
6	0.5	FH-M3-6	4	3.0 mm	1.000	5.5	3	0.000 to 0.08	5	Not Rated	Not Rated	50	000000000	00000
M4
6	0.7	FH-M4-6	4	No. 22	1.000	7	4	0.000 to 0.08	6.3	Not Rated	Not Rated	50	000000000	00000

Stainless Steel Press-Fit Studs

18-8 stainless steel studs have good chemical resistance and may be mildly magnetic. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.

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

Metric 18-8 Stainless Steel
Lg., mm	Thread Pitch, mm	PEM® Part Number	Thread Lg., mm	Drill Bit Size, mm	For Min. Material Thick., mm	For Min. Lg. Between Hole Center and Sheet Edge, mm	For Hole Dia., mm	Hole Size Tolerance, mm	Base Dia., mm	Tensile Strength	Hardness	Pkg. Qty.		Pkg.
M2.5
6	0.45	FHS-M2.5-6	4	2.5	1.000	5	2.5	0.000 to 0.08	3.7	Not Rated	Not Rated	25	000000000	000000
M3
6	0.5	FHS-M3-6	4	3.0	1.000	5.5	3	0.000 to 0.08	4.2	Not Rated	Not Rated	25	000000000	0000
M4
6	0.7	FHS-M4-6	4	4.0	1.000	7	4	0.000 to 0.08	5.5	Not Rated	Not Rated	25	000000000	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.

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

Metric

		Stud		Tolerance
Dia., mm	Lg., mm	Dia., mm	Lg., mm	Lg., mm	Stud Dia., mm	Specifications Met		Each
Steel
10	6	6	9	-0.03 to 0	0 to 0.02	DIN 6321	0000000	000000