24mm 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.

Spring Steel—Strong and resilient, but best suited for dry environments since moisture will cause these springs to rust.

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.
Spring Steel



	24	5.4	4.6	0.4	7.6	0.81	0.06	Closed	DIN 2095, DIN 17223	5	94125K412	00000


	24	14.1	10.9	1.6	14.1	21	2.2	Closed and Ground	DIN 2095, DIN 2098, DIN 17223	5	94125K112	00000


	Corrosion-Resistant 302 Stainless Steel



			24	4.39	3.58	0.41	9.8	0.88	0.06	Closed	—	5	2006N107	00000


			24	5.41	4.6	0.41	8.5	0.72	0.05	Closed	—	5	2006N103	00000
			24	6	4	1	17.4	8.1	1.2	Closed and Ground	DIN 2095	5	2006N284	00000
			24	13.5	11.5	1	9.4	4.1	0.28	Closed and Ground	DIN 2095	5	2006N285	00000


			Highly Corrosion-Resistant 316 Stainless Steel



					24	4.4	3.6	0.4	11.9	0.7	0.06	Closed	—	1	8969T312	0000


					24	5.4	4.6	0.4	10.8	0.6	0.04	Closed	—	1	8969T316	0000
					24	6	4	1	18.1	7.2	1.2	Closed and Ground	—	1	8969T748	0000
					24	13.5	11.5	1	12	3.4	0.28	Closed and Ground	—	1	8969T767	0000
					24	14.1	10.9	1.6	17.1	12	1.9	Closed and Ground	—	1	8969T935	0000

Extension Springs

The farther you stretch these springs, the harder they pull to bring the two ends back together. They're commonly used to tension cable, return an air cylinder to its starting point, or hold a door closed.

Loop End—The most secure attachment method. With fully closed loops, there's no risk of slipping off.

Hook End—Hook into closed holes, such as hanger bolt eyes. These springs work best when kept under tension, as they're more likely to slip off than loop-end springs when tension is released. Also known as machine hook ends.

Spring Steel—Strong and resilient, but best suited for dry environments since moisture will cause these springs to rust.

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 extend than steel, but can’t handle as high a load.

Minimum Load—The amount of force required to start extending the spring.

Maximum Load—The amount of force required to fully extend the spring.

					Load, lb.
	Lg., mm	OD, mm	Wire Dia., mm	Extended Lg. @ Max. Load, mm	Min.	Max.	Spring Rate, lbf/mm	Pkg. Qty.		Pkg.
Loop End







				Spring Steel

				24	5	0.7	39.6	0.87	5.08	0.28	2	5108N997	000000




						Corrosion-Resistant 302 Stainless Steel

						24	5	0.7	39.6	0.87	4.23	0.23	2	8464N17	00000


						Hook End







										Spring Steel

										24	5	0.7	39.6	0.88	5.08	0.28	2	7678N18	00000


										24	5.5	1.1	29.7	4.12	16.36	2.47	2	7678N212	00000

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.

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







		2 mm Diameter

		24	2	0.2	330 lbf	Rockwell C42	DIN 7346, ISO 13337	100	97161A112	000000


		24	2 to 2.1	0.4	600 lbf	Rockwell C42	ISO 8752	100	91611A111	00000




				2.5 mm Diameter

				24	2.5	0.25	530 lbf	Rockwell C42	DIN 7346, ISO 13337	50	97161A123	0000


				24	2.5 to 2.6	0.5	950 lbf	Rockwell C42	ISO 8752	100	91611A098	0000




						3 mm Diameter

						24	3	0.3	780 lbf	Rockwell C42	DIN 7346, ISO 13337	50	97161A136	0000


						24	3 to 3.1	0.6	1,400 lbf	Rockwell C42	ISO 8752	100	91611A161	00000




								4 mm Diameter

								24	4	0.5	1,700 lbf	Rockwell C42	DIN 7346, ISO 13337	50	97161A152	0000


								24	4 to 4.2	0.8	2,500 lbf	Rockwell C42	ISO 8752	100	91611A211	00000




										5 mm Diameter

										24	5	0.5	2,300 lbf	Rockwell C42	DIN 7346, ISO 13337	50	97161A170	00000


										24	5 to 5.2	1	3,900 lbf	Rockwell C42	ISO 8752	100	91611A310	00000




												6 mm Diameter

												24	6	0.75	4,000 lbf	Rockwell C42	DIN 7346, ISO 13337	25	97161A189	00000


												24	6 to 6.2	1.2	5,800 lbf	Rockwell C42	ISO 8752	100	91611A407	00000




												8 mm Diameter

	24											8	0.75	5,300 lbf	Rockwell C42	DIN 7346, ISO 13337	10	97161A210	0000




												10 mm Diameter

												24	10	1	5,300 lbf	Rockwell C42	DIN 7346, ISO 13337	10	97161A231	0000


		24										10 to 10.3	2	15,700 lbf	Rockwell C42	ISO 8752	25	91611A607	00000




												12 mm Diameter

												24	12	1	10,700 lbf	Rockwell C42	DIN 7346, ISO 13337	10	97161A246	00000




												13 mm Diameter

												24	13	1.2	14,800 lbf	Rockwell C42	DIN 7346, ISO 13337	5	97161A267	00000




														16 mm Diameter

						24	16							1.5	22,000 lbf	Rockwell C42	DIN 7346, ISO 13337	1	97161A282	0000


						Corrosion-Resistant 18-8 Stainless Steel







									2 mm Diameter

									24						2 to 2.1	0.4	Not Rated	Not Rated	DIN 1481, ISO 8752	25	91610A211	0000




																3 mm Diameter

																24	3 to 3.1	0.6	Not Rated	Not Rated	DIN 1481, ISO 8752	10	91610A411	0000




																4 mm Diameter

																24	4 to 4.2	0.8	Not Rated	Not Rated	DIN 1481, ISO 8752	10	91610A511	0000




																5 mm Diameter

																24	5 to 5.2	1	Not Rated	Not Rated	DIN 1481, ISO 8752	10	91610A611	0000




																6 mm Diameter

																24	6 to 6.2	1.2	Not Rated	Not Rated	DIN 1481, ISO 8752	10	91610A711	0000




		10 mm Diameter

		24	10 to 10.3															2	Not Rated	Not Rated	DIN 1481, ISO 8752	1	91610A907	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.

	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







	4 mm Diameter

	24	4.000 to 4.100	2,100	Rockwell C43	ISO 8750	25	91612A239	000000




			5 mm Diameter

			24	5.000 to 5.100	3,300	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	25	91612A317	00000




					6 mm Diameter

					24	6.000 to 6.100	4,900	Rockwell C43	DIN 7343, ISO 8750	25	91612A821	00000




							10 mm Diameter

							24	10.000 to 10.100	13,900	Rockwell C43	ASME B18.8.3M, ISO 8748	1	91612A323	0000


							Corrosion-Resistant 18-8 Stainless Steel







											4 mm Diameter

											24	4.000 to 4.100	1,700	Not Rated	DIN 7343, ISO 8750	10	91612A169	0000




													6 mm Diameter

													24	6.000 to 6.100	3,700	Not Rated	DIN 7343, ISO 8750	5	91612A195	00000