12mm Springs | McMaster-Carr

Squeeze these springs and they’ll push right back to their original length. When compressed, they apply steady pressure to keep components securely in place. Release the pressure and they snap back instantly, just like the tip of a ballpoint pen.

Corrosion-Resistant 302 Stainless Steel—Won’t corrode from exposure to moisture and mild chemicals, including ammonia often found in cleaning solutions. These springs are easier to compress than steel, but can’t handle as high a load.

Highly-Corrosion-Resistant 316 Stainless Steel—Our most corrosion-resistant stainless steel springs won't degrade when exposed to salt water and harsh chemicals. They're easier to compress than steel, but can’t handle as high a load.

	OD, mm	ID, mm	Wire Dia., mm	Compressed Lg. @ Max. Load, mm	Max. Load, lb.	Spring Rate, lbf/mm	End Type	Specs. Met	Pkg. Qty.		Pkg.
Corrosion-Resistant 302 Stainless Steel



	12	3	2	0.5	9	1.95	0.61	Closed	DIN 2095	5	00000000	000000


	12	3.61	2.8	0.41	6.1	1	0.18	Closed	—	5	00000000	00000
	12	5.8	4.2	0.8	7.7	4.87	1.14	Closed	DIN 2095	5	00000000	00000
	12	6	4	1	9	8.19	2.77	Closed and Ground	DIN 2095	5	00000000	00000
	12	7.55	5.05	1.25	7.2	24.98	5.44	Closed and Ground	DIN 2095	5	00000000	00000


	Highly-Corrosion-Resistant 316 Stainless Steel



			12	3	2	0.5	8.712	2	0.62	Closed and Ground	—	1	00000000	0000


			12	3.6	2.8	0.4	6.9	0.9	0.17	Closed	—	1	00000000	0000
			12	5.8	4.2	0.8	8.204	4.2	1.13	Closed and Ground	—	1	0000000	0000
			12	6	4	1	9.398	7.2	2.81	Closed and Ground	—	1	00000000	0000
			12	7.55	5.05	1.27	9.779	11.8	5.4	Closed and Ground	—	1	00000000	0000

Slotted Spring Pins

End View

Squeeze these pins into holes and they expand slightly, creating tension to hold parts in place. They are often used as hinge pins and as fasteners for springs and power transmission components. An alternative to dowel pins, they're lighter in weight with a hollow center and don’t need a precise hole. Also known as roll pins.

Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.

Corrosion-Resistant 18-8 Stainless Steel—The choice for wet and outdoor environments, these pins resist rusting. They are strong enough to join most components but won't withstand extreme stress and vibration as well as steel.

	Lg., mm	For Hole Dia., mm	Wall Thk., mm	Double Shear Breaking Strength, lbf	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







				1.5 mm Diameter

				12	1.5 to 1.6	0.3	350	Rockwell C42	DIN 1481, ISO 8752	100	000000000	000000




						2 mm Diameter

						12	2	0.2	330	Rockwell C42	DIN 7346, ISO 13337	100	000000000	00000


						12	2 to 2.1	0.4	600	Rockwell C42	ISO 8752	200	000000000	00000




								2.5 mm Diameter

								12	2.5	0.25	530	Rockwell C42	DIN 7346, ISO 13337	100	000000000	00000




										3 mm Diameter

										12	3	0.3	780	Rockwell C42	DIN 7346, ISO 13337	100	000000000	00000


										12	3 to 3.1	0.6	1,400	Rockwell C42	ISO 8752	200	000000000	00000




												4 mm Diameter

												12	4	0.5	1,700	Rockwell C42	DIN 7346, ISO 13337	50	000000000	0000


												12	4 to 4.2	0.8	2,500	Rockwell C42	ISO 8752	100	000000000	00000




														5 mm Diameter

														12	5	0.5	2,300	Rockwell C42	DIN 7346, ISO 13337	25	000000000	0000


														12	5 to 5.2	1	3,900	Rockwell C42	ISO 8752	100	000000000	00000




																6 mm Diameter

																12	6	0.75	4,000	Rockwell C42	DIN 7346, ISO 13337	50	000000000	00000


12	6 to 6.2															1.2	5,800	Rockwell C42	ISO 8752	100	000000000	00000




		8 mm Diameter

		12	8													0.75	5,300	Rockwell C42	DIN 7346, ISO 13337	25	000000000	00000




				10 mm Diameter

				12	10											1	5,300	Rockwell C42	DIN 7346, ISO 13337	10	000000000	0000




																13 mm Diameter

																12	13	1.2	14,800	Rockwell C42	DIN 7346, ISO 13337	1	000000000	0000




																16 mm Diameter

																12	16	1.5	22,000	Rockwell C42	DIN 7346, ISO 13337	5	000000000	0000


								Corrosion-Resistant 18-8 Stainless Steel







																		1.5 mm Diameter

										12	1.5 to 1.6							0.3	Not Rated	Not Rated	ISO 8752	25	000000000	0000




																		2 mm Diameter

																		12	2 to 2.1	0.4	Not Rated	Not Rated	DIN 1481, ISO 8752	25	000000000	0000




																		3 mm Diameter

																		12	3 to 3.1	0.6	Not Rated	Not Rated	DIN 1481, ISO 8752	25	000000000	0000




														4 mm Diameter

														12	4 to 4.2					0.8	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000




5 mm Diameter

12	5 to 5.2																			1	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000




																				6 mm Diameter

		12	6 to 6.2																	1.2	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000

Coiled Spring Pins


	End View

The best spring pins for joining parts exposed to vibration and shock. They're often used in power transmission, automation, and other assemblies with constant motion and sudden starts and stops. Because of their spiral shape, they flex to conform to holes that aren’t perfectly round.

Spring Steel—These pins won't deform from stress and vibration. Although they're stronger than stainless steel, they're best for dry environments since moisture will cause them to rust.

	For Hole Dia., mm	Double Shear Breaking Strength, lbf	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







			1.5 mm Diameter

			12	1.500 to 1.600	320	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	50	000000000	000000




					2 mm Diameter

					12	2.000 to 2.100	550	Rockwell C41	DIN 7343, ISO 8750	50	000000000	0000




							2.5 mm Diameter

							12	2.500 to 2.600	850	Rockwell C43	DIN 7343, ISO 8750	50	000000000	0000




									3 mm Diameter

									12	3.000 to 3.100	1,200	Rockwell C43	ISO 8750	50	000000000	00000




											4 mm Diameter

											12	4.000 to 4.100	2,100	Rockwell C43	DIN 7343, ISO 8750	25	000000000	0000




													5 mm Diameter

													12	5.000 to 5.100	3,300	Rockwell C43	DIN 7343, ISO 8750	25	000000000	0000


													Corrosion-Resistant 18-8 Stainless Steel







																	1.5 mm Diameter

																	12	1.500 to 1.600	200	Not Rated	ASME B18.8.3M, DIN 7343, ISO 8750	25	000000000	0000




																			2 mm Diameter

12																			2.000 to 2.100	400	Not Rated	DIN 7343, ISO 8750	25	000000000	0000




	2.5 mm Diameter

	12	2.500 to 2.600																	650	Not Rated	DIN 7343, ISO 8750	25	000000000	00000




																			3 mm Diameter

			12	3.000 to 3.100															900	Not Rated	DIN 7343, ISO 8750	25	000000000	00000




																			4 mm Diameter

					12	4.000 to 4.100													1,700	Not Rated	DIN 7343, ISO 8750	10	000000000	0000




																			5 mm Diameter

							12	5.000 to 5.100											2,500	Not Rated	DIN 7343, ISO 8750	10	000000000	0000