ISO 8740 Dowel Pins | McMaster-Carr

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8 Products

Fully Grooved Dowel Pins

With a tighter fit than standard dowel pins, these resist pulling from movement and vibration, even in imperfect holes. Three grooves pinch shut when installed, creating tension to lock in place. Also known as Type A pins.

For the best fit, drill your hole slightly larger than the nominal diameter shown.

Steel

Parallel Groove

Zinc-Plated Carbon Steel—These pins withstand occasional exposure to moisture. However, since friction from moving parts can wear away the finish, they're not ideal for wet environments. While not nearly as corrosion resistant as stainless steel, they are stronger and won’t deform under stress.

Parallel Groove—Fit tighter than pins with tapered grooves to stay in place under severe vibration. However, they require more force to insert.

Material Certificate—Pins include a report with a traceable lot number and a description of their chemical, physical, and mechanical properties.

		Nominal, mm		Max., mm
	Lg., mm	Dia.	Dia. Tolerance	Dia.	Dia. Tolerance	Groove Type	Double Shear Breaking Strength, lbf	Min. Hardness	Specs. Met	Certificate Type	Pkg. Qty.		Pkg.
Zinc-Plated Carbon Steel







				2 mm Diameter

				14	2	-0.025 to 0	2.15	0 to 0.05	Parallel	600	Rockwell B68	ISO 8740	—	10	5429N111	00000


				16	2	-0.025 to 0	2.15	0 to 0.05	Parallel	600	Rockwell B68	ISO 8740	—	10	5429N113	0000




						3 mm Diameter

						12	3	-0.025 to 0	3.2	-0.05 to 0.05	Parallel	1,400	Rockwell B68	ISO 8740	Material Certificate	10	5429N118	0000




								4 mm Diameter

								20	4	-0.075 to 0	4.25	-0.05 to 0.05	Parallel	2,500	Rockwell B68	ISO 8740	—	10	5429N123	0000


								26	4	-0.075 to 0	4.25	-0.05 to 0.05	Parallel	2,500	Rockwell B68	ISO 8740	—	10	5429N125	0000
								30	4	-0.075 to 0	4.25	-0.05 to 0.05	Parallel	2,500	Rockwell B68	ISO 8740	—	10	5429N126	0000




										5 mm Diameter

										16	5	-0.075 to 0	5.25	-0.05 to 0.05	Parallel	3,900	Rockwell B68	ISO 8740	—	10	5429N127	0000




												6 mm Diameter

												20	6	-0.075 to 0	6.3	-0.05 to 0.05	Parallel	5,700	Rockwell B68	ISO 8740	—	10	5429N133	00000