M4 Dowel Pins | McMaster-Carr

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	System of Measurement System of Measurement

Metric

	Diameter Diameter

6mm

	Length Length

	Thread Size Thread Size	Show

	Thread Size Thread Size	Hide

	Thread Pitch Thread Pitch

0.7 mm

	Head Type Head Type


Tapped	Headless

	Material Material

Steel

Stainless Steel

Aluminum

	Shaft Type Shaft Type


Plain	D-Profile

	End Shape End Shape

	Chamfered

	Pin Type Pin Type

	Dowel

	Specifications Met Specifications Met

ISO

DIN

	Tolerance Rating Tolerance Rating

Standard

	Shaft Diameter Shaft Diameter

4 mm

	Minimum Hardness Minimum Hardness

Rockwell C18

Rockwell C52

	End Type End Type

	Plain

	Shaft Length Shaft Length

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

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

	Breaking Strength Breaking Strength

6,600 lbs.

101,000 lbs.

	Shoulder Length Shoulder Length

	Thread Length Thread Length

4.496mm

4.8 mm

6 mm

	Thread Type Thread Type

Metric

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About Shoulder Screws

About Threaded Studs and Rods

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 1050-1095 Spring Steel Pins

		Thread
Lg., mm	Dia. Tolerance, mm	Size	Pitch, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met		Each
6 mm Dia.
16	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	00000
18	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
20	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
24	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
28	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
30	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
32	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
36	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
40	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
50	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000
60	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000

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	3/16"-5/8" (6-12 mm)	__	000000000	00000
Optional Extension	__	5 1/2"	000000000	00000

Flat-Vent Pull-Out Dowel Pins

The flat side of these pins relieves trapped air, making them easier to insert and remove from blind holes. One end is tapped and the other is chamfered for easy insertion. To remove, thread a screw or tool into the tapped hole, then pull them out. 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 standards.

Steel pins have good strength.

Use puller handles, tips, and optional extensions (sold separately) with some internally threaded dowel pins to create insertion and removal tools. 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.

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

Metric 1050-1095 Spring Steel Pins

Pins
		Thread							Puller Handles		Tips		Optional Extensions
Lg., mm	Dia. Tolerance, mm	Size	Pitch, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met		Each		Each		Each		Each
6 mm Dia.
16	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	00000	000000000	000000	000000000	000000	000000000	000000
18	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
20	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
24	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
28	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
30	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
36	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
40	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000
50	0.004 to 0.012	M4	0.7	Rockwell C52	6,600	DIN 7979D-m6	000000000	0000	000000000	00000	000000000	00000	000000000	00000

Metric 303 Stainless Steel Pins

		Thread
Lg., mm	Dia. Tolerance, mm	Size	Pitch, mm	Min. Hardness	Breaking Strength, lbs.	Specifications Met		Each
6 mm Dia.
16	0.004 to 0.015	M4	0.7	Rockwell C18	101,000	DIN 7979C-m6	000000000	00000
24	0.004 to 0.015	M4	0.7	Rockwell C18	101,000	DIN 7979C-m6	000000000	00000
30	0.004 to 0.015	M4	0.7	Rockwell C18	101,000	DIN 7979C-m6	000000000	00000
36	0.004 to 0.015	M4	0.7	Rockwell C18	101,000	DIN 7979C-m6	000000000	00000
40	0.004 to 0.015	M4	0.7	Rockwell C18	101,000	DIN 7979C-m6	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
M4 × 0.7 mm
10	4.8	5.2	4	-0.18 to 0	Not Rated	Rockwell B75	Slotted	DIN 427, ISO 2342	25	000000000	00000
12	4.8	7.2	4	-0.18 to 0	Not Rated	Rockwell B75	Slotted	DIN 427, ISO 2342	25	000000000	00000
16	4.8	11.2	4	-0.18 to 0	Not Rated	Rockwell B75	Slotted	DIN 427, ISO 2342	25	000000000	00000
20	4.8	15.2	4	-0.18 to 0	Not Rated	Rockwell B75	Slotted	DIN 427, ISO 2342	25	000000000	00000

Headless Alloy Steel Precision Shoulder Screws

Without a head to get in the way, these screws fit in tight spaces where standard shoulder screws cannot. Either thread them in a countersunk hole for a flush mount, or install them with the shoulder sticking out to use them as pins or dowels for aligning and locating components. With a shoulder diameter that is more precise than our general purpose shoulder screws, these screws are a good choice for measuring devices, optical fixtures, laboratory equipment, and other applications where precision matters. Made of alloy steel, they are strong and resist wear.

Metric screws meet DIN 927, an international standard for slotted shoulder screw dimensions.

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

5.5mm Shoulder Dia.—Precise Fit (-0.03mm to 0mm Dia. Tolerance)
Shoulder Lg.	Thread Size	Thread Pitch, mm	Thread Lg.	Specifications Met	Pkg. Qty.		Pkg.
4mm	M4	0.7	6mm	DIN 927	5	000000000	00000
5mm	M4	0.7	6mm	DIN 927	5	000000000	0000
6mm	M4	0.7	6mm	DIN 927	5	000000000	0000
8mm	M4	0.7	6mm	DIN 927	5	000000000	0000
10mm	M4	0.7	6mm	DIN 927	5	000000000	0000

Inspection and Measuring Fixturing

Use these components in coordinate measuring machine (CMM) applications to raise a workpiece and reliably position it on a fixture plate with 1/4"-20 holes. They are not for use in machining applications.

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

Hold-Down Clamps

Hold-Down Clamp

Hold-down clamps thread directly into a fixture plate, tower, or compatible component. Slide the clamp down its shaft and press into place against the workpiece for a light hold. They're also known as tension spring clamps.

		Thread
Reach	Ht.	Size	Pitch, mm	Lg.	Material		Each
Standard
21mm	50mm	M4	0.7	4.496mm	Aluminum	0000000	000000
38mm	50mm	M4	0.7	4.496mm	Aluminum	0000000	00000
58mm	50mm	M4	0.7	4.496mm	Aluminum	0000000	00000

Ball-Lock Quick-Change Fixture Clamps

Build these components into fixture plates, machine subplates, and tombstones for quick changes. The system clamps and locates at the same time for accurate positioning with repeatability of ±0.0005". Components are compatible with Jergens Ball-Lock, Carr-Lane Carr Lock, and Kurt PinLock quick change systems.

For accurate positioning, at least two sets of clamps, liners, and receivers are required. Install the receivers in the base plate and the liners in the fixture plate. Then line up the two plates, insert the clamps, and tighten their screws to secure the fixture in place. If more holding capacity is needed, use additional clamps and receivers but omit liners to prevent the clamp from getting stuck in the fixture plate.

Push receiver plugs into unused receivers to prevent chips and coolant from accumulating during machining. When installed, plugs sit flush with the surface of the fixture plate. To remove, thread a screw into the tapped hole in the center and pull up.

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

Receiver Plugs

Receiver Plug

		Thread
For Clamp Shank Dia., mm	Lg., mm	Size	Pitch, mm	Material		Each
13	8	M4	0.7	Aluminum	0000000	00000
16	8	M4	0.7	Aluminum	0000000	0000
20	8	M4	0.7	Aluminum	0000000	00000
25	10	M4	0.7	Aluminum	0000000	00000
30	11	M4	0.7	Aluminum	0000000	00000