20mm Pins | McMaster-Carr

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REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Thread Size Thread Size

M10

	Breaking Strength Breaking Strength

	Tolerance Rating Tolerance Rating

Standard

	Head Height Head Height

29 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. 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.

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

Metric 52100 Alloy Steel

20 mm Dia.
Lg., mm	Dia. Tolerance, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met	Pkg. Qty.		Pkg.
50	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000
60	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000
70	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000
80	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000
90	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000
100	0.008 to 0.021	Rockwell C52	Not Rated	DIN 6325-m6, ISO 8734	1	000000000	00000

Pull-Out Dowel Pins

One end of these pins is tapped, and the other is chamfered for easy insertion. To remove, thread a screw or tool into the tapped hole, then pull the pin out. Because they aren't vented, they work best in through holes. Use them as pivots, hinges, shafts, jigs, and fixtures to locate or hold parts. Pins are precision ground for accurate alignment. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces.

Metric pins meet DIN 7979D-m6 specifications.

Steel pins have good strength.

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

Metric 52100 Alloy Steel Pins

		Thread
Lg., mm	Dia. Tolerance, mm	Size	Pitch, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met		Each
20 mm Dia.
50	0.008 to 0.021	M10	1.5	Rockwell C52	51,500	DIN 7979D-m6	000000000	00000
60	0.008 to 0.021	M10	1.5	Rockwell C52	51,500	DIN 7979D-m6	000000000	00000
80	0.008 to 0.021	M10	1.5	Rockwell C52	51,500	DIN 7979D-m6	000000000	00000

Optional Insertion and Removal Tools

Use with internally threaded dowel pins. A complete tool requires a puller handle and a tip that fits your pin. You’ll also need a socket head cap screw that can thread into the pin. To use, thread a tip into the puller handle and fit the other end of the tip over the screw. Slide the weight along the handle to push or pull.

Component	For Pin Dia.	Overall Lg.		Each
Puller Handle	__	12 1/4"	000000000	000000
Tip	3/4"-1 1/2" (13-20 mm)	__	000000000	00000
Optional Extension	__	5 1/2"	000000000	00000

Clevis Pins

Clevis Pin

An alternative to bolts and rivets, these pins lock in place with a cotter pin. Choose a clevis pin and add your own cotter pin, or select a clevis pin that includes a reusable hairpin cotter pin.

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

Metric pins meet DIN 1444B specifications.

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

Metric Zinc-Plated 1004-1045 Carbon Steel Clevis Pins

			Head
Usable Lg., mm	Lg., mm	Dia. Tolerance, mm	Dia., mm	Ht., mm	Through Hole Dia., mm	For Max. Cotter Pin Dia., mm	Min. Hardness	Specifications Met	Pkg. Qty.		Pkg.
20 mm Dia.
29	40	-0.130 to 0.000	30	5	5	5	Rockwell B67	DIN 1444B	1	000000000	000000
39	50	-0.130 to 0.000	30	5	5	5	Rockwell B67	DIN 1444B	1	000000000	00000
49	60	-0.130 to 0.000	30	5	5	5	Rockwell B67	DIN 1444B	1	000000000	00000
54	65	-0.130 to 0.000	30	5	5	5	Rockwell B67	DIN 1444B	1	000000000	00000
82	90	-0.130 to 0.000	30	5	5	5	Rockwell B67	DIN 1444B	1	000000000	00000

Toggle-Lock Clevis Pins with Handle

A swivel handle makes these pins easy to install and remove, while the toggle locks them in place. Flip the toggle to release the pin.

Zinc-plated carbon steel pins have good strength and some corrosion resistance.

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

Zinc-Plated 1045 Carbon Steel
Usable Lg.	Dia. Tolerance	Min. Hardness		Each
20mm Dia.
150mm	-0.130mm to 0mm	Rockwell B70	000000000	000000

Strong-Hold Quick-Release Pins

Two spring-loaded balls give these pins more holding power than quick-release pins with only one retaining ball. They pop out when the pin is pushed into a hole, and retract when the pin is pulled out. For the best fit, the hole should be as close to the diameter as possible, but not larger than the diameter at extended ball height.

Pins are made of 17-4 PH stainless steel for strength with some corrosion resistance, and passivated for added protection against corrosion and oxidation. They are magnetic. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces

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

17-4 PH Stainless Steel
Usable Lg.	Dia. Tolerance	Dia. at Extended Ball Ht.	Min. Hardness	Breaking Strength, lbs.		Each
20mm Dia.
25mm	-0.08mm to 0mm	22.91mm	Rockwell C40	97,300	000000000	000000
40mm	-0.08mm to 0mm	22.91mm	Rockwell C40	97,300	000000000	00000
60mm	-0.08mm to 0mm	22.91mm	Rockwell C40	97,300	000000000	00000
80mm	-0.08mm to 0mm	22.91mm	Rockwell C40	97,300	000000000	00000
100mm	-0.08mm to 0mm	22.91mm	Rockwell C40	97,300	000000000	00000

T-Handle Locking Quick-Release Pins

Pin with Split Ring

For a more secure hold than standard quick-release pins, these pins lock in place until you push the button to release the spring-loaded retaining balls. A T-handle makes them easy to grip. Use them in a hole as close to the diameter as possible, but not larger than the diameter at extended ball height. Pins are made of 17-4 PH stainless steel for strength with some corrosion resistance, and passivated for added protection against corrosion and oxidation. They are magnetic. Breaking strength is measured as double shear, which is the force required to break a pin into three pieces.

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

						With Split Ring
Usable Lg.	Dia. at Extended Ball Ht.	Min. Hardness	Breaking Strength, lbs.	Handle Material	Handle Color		Each
Metric 17-4 PH Stainless Steel
20mm Dia.
50mm	24.08mm	Rockwell C40	90,500	380 Aluminum	Black	000000000	000000
100mm	24.08mm	Rockwell C40	90,500	380 Aluminum	Black	000000000	000000

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.

H13 tool steel pins resist rapid changes in temperature.

Metric pins meet DIN 1530 specifications.

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

Metric Nitride-Coated H13 Tool Steel

		Head			250 mm Lg.		315 mm Lg.		400 mm Lg.
Dia., mm	Dia. Tolerance, mm	Dia., mm	Ht., mm	Min. Hardness		Each		Each		Each
20.0000	-0.017 to -0.006	26	8	Rockwell C41	000000000	000000	000000000	000000	000000000	000000

Screw-Mount Locating and Support Buttons

Mount through the counterbored hole with a socket head cap screw to support and position workpieces and fixtures from the bottom or side. They’re also known as rest buttons.

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

Metric

Steel
Dia., mm	Lg., mm	Lg. Tolerance, mm	For Mounting Screw Size	Mounting Fasteners Included		Each
20	12	-0.03 to 0.03	M6	No	0000000	00000