ISO 2338-h8 Dowel Pins | McMaster-Carr

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Undersized Dowel Pins

You don’t need to create precise holes for these pins when aligning parts you plan to bolt together. They have a slightly undersized diameter to slip into place without the need for special installation tools, like an arbor press. Undersized pins are also used for prototyping and positioning components you need to assemble and disassemble frequently.

Steel

Machinable Carbon Steel—Made of 12L14 carbon steel, these pins are the easiest to machine, so you can shape them if they don't quite match your hole dimensions. Stronger than stainless steel but not quite as strong as alloy steel, they won't deform from stress and vibration. Pins perform best in dry environments since moisture will cause them to rust.

	Dia. Tolerance, mm	Double Shear Breaking Strength	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Machinable Carbon Steel





			2 mm Diameter
			4	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
			6	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	0000
			8	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	0000
			10	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	0000



					3 mm Diameter
					6	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
					8	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
					10	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
					12	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
					16	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
					20	-0.014 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000



							4 mm Diameter
							8	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
							10	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	100	000000000	00000
							12	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
							14	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	0000
							16	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
							20	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	0000



									5 mm Diameter
									10	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
									12	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
									14	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
									16	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
									20	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000



											6 mm Diameter
											12	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
											16	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
											20	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000
											24	-0.018 to 0	Not Rated	Rockwell B68	ISO 2338-h8	50	000000000	00000



													8 mm Diameter
													16	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	25	000000000	00000
													18	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	25	000000000	00000
													20	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	25	000000000	00000
													24	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	25	000000000	00000
													30	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	10	000000000	0000



															10 mm Diameter
															20	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000
															24	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000
															30	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000
															32	-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000
40															-0.022 to 0	Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000



	12 mm Diameter
	30	-0.027 to 0													Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	00000
	40	-0.027 to 0													Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	0000
	50	-0.027 to 0													Not Rated	Rockwell B68	ISO 2338-h8	5	000000000	00000

Corrosion-Resistant Stainless Steel

18-8 Stainless Steel—The choice for wet and outdoor environments. In addition to resisting rust, these pins also withstand mild chemicals such as cleaners and degreasers. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.

	Lg., mm	Dia. Tolerance, mm	Double Shear Breaking Strength	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
18-8 Stainless Steel





				1 mm Diameter
				4	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	000000
				5	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
				6	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000



						1.5 mm Diameter
						4	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000
						5	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000
						6	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000
						8	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000
						10	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000



								2 mm Diameter
								4	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
								5	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	0000
								6	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
								8	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
								10	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
								12	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
								16	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000



										2.5 mm Diameter
										6	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
										8	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
										10	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000



												3 mm Diameter
												5	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												6	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	100	000000000	00000
												8	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												10	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												12	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												14	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												16	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
												20	-0.014 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	0000



														4 mm Diameter
														6	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	0000
														8	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
														10	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
														12	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
														14	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	0000
														16	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	50	000000000	00000
														20	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	00000



																5 mm Diameter
																8	-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	0000
10																-0.018 to 0	Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	00000
12	-0.018 to 0															Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	00000
14	-0.018 to 0															Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	0000
16	-0.018 to 0	Not Rated														Rockwell B95	ISO 2338-h8	25	000000000	00000
20	-0.018 to 0	Not Rated	Rockwell B95													ISO 2338-h8	25	000000000	00000



		6 mm Diameter
		10	-0.018 to 0													Not Rated	Rockwell B95	ISO 2338-h8	10	000000000	0000
		12	-0.018 to 0													Not Rated	Rockwell B95	ISO 2338-h8	25	000000000	00000
		14	-0.018 to 0	Not Rated												Rockwell B95	ISO 2338-h8	10	000000000	0000
		16	-0.018 to 0	Not Rated	Rockwell B95											ISO 2338-h8	25	000000000	00000
		18	-0.018 to 0	Not Rated	Rockwell B95											ISO 2338-h8	10	000000000	0000
		20	-0.018 to 0	Not Rated	Rockwell B95											ISO 2338-h8	25	000000000	00000
		24	-0.018 to 0	Not Rated	Rockwell B95											ISO 2338-h8	5	000000000	0000
		30	-0.018 to 0	Not Rated	Rockwell B95											ISO 2338-h8	10	000000000	00000



				8 mm Diameter
				16	-0.022 to 0	Not Rated										Rockwell B95	ISO 2338-h8	5	000000000	0000
				18	-0.022 to 0	Not Rated	Rockwell B95									ISO 2338-h8	5	000000000	0000
				20	-0.022 to 0	Not Rated	Rockwell B95									ISO 2338-h8	5	000000000	0000
				24	-0.022 to 0	Not Rated	Rockwell B95									ISO 2338-h8	5	000000000	00000



						10 mm Diameter
						20	-0.022 to 0									Not Rated	Rockwell B95	ISO 2338-h8	5	000000000	0000
						24	-0.022 to 0									Not Rated	Rockwell B95	ISO 2338-h8	5	000000000	00000
						32	-0.022 to 0									Not Rated	Rockwell B95	ISO 2338-h8	5	000000000	00000
						40	-0.022 to 0									Not Rated	Rockwell B95	ISO 2338-h8	5	000000000	00000



								12 mm Diameter
								30	-0.027 to 0							Not Rated	Rockwell B95	ISO 2338-h8	5	000000000	00000
								40	-0.027 to 0							Not Rated	Rockwell B95	ISO 2338-h8	1	000000000	0000
								50	-0.027 to 0							Not Rated	Rockwell B95	ISO 2338-h8	1	000000000	0000