5.5mm Dowel Pins | McMaster-Carr

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.
5.500mm	0mm to 0.008mm	8mm	5mm	Rockwell C60	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.

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 Nitride-Coated H13 Tool Steel

		Head
Dia., mm	Dia. Tolerance, mm	Dia., mm	Ht., mm	Min. Hardness		Each
160 mm Lg.
5.5000	-0.002 to -0.008	10	3	Rockwell C41	000000000	00000
250 mm Lg.
5.5000	-0.002 to -0.008	10	3	Rockwell C41	000000000	00000
315 mm Lg.
5.5000	-0.002 to -0.008	10	3	Rockwell C41	000000000	00000
400 mm Lg.
5.5000	-0.002 to -0.008	10	3	Rockwell C41	000000000	00000
500 mm Lg.
5.5000	-0.002 to -0.008	10	3	Rockwell C41	000000000	00000

Metric M2 Tool Steel

		Head
Dia., mm	Dia. Tolerance, mm	Dia., mm	Ht., mm	Min. Hardness		Each
100 mm Lg.
5.5000	-0.012 to -0.004	10	3	Rockwell C60	000000000	000000
125 mm Lg.
5.5000	-0.012 to -0.004	10	3	Rockwell C60	000000000	00000
160 mm Lg.
5.5000	-0.012 to -0.004	10	3	Rockwell C60	000000000	00000
200 mm Lg.
5.5000	-0.012 to -0.004	10	3	Rockwell C60	000000000	00000
250 mm Lg.
5.5000	-0.012 to -0.004	10	3	Rockwell C60	000000000	00000