100mm 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.

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	Pkg. Qty.		Pkg.
Highly Corrosion-Resistant 316 Stainless Steel



	100	18.29	14.27	2.03	62	19	0.48	Closed and Ground	1	00000000	00000

Extension Springs

Hook End

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.

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.

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.
Hook End







				Corrosion-Resistant 302 Stainless Steel

				100	28	4	140.7	29.41	105.62	2.21	1	00000000	000000

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.

	Double Shear Breaking Strength, lbf	Min. Hardness	Specs. Met	Pkg. Qty.		Pkg.
Spring Steel







	6 mm Diameter

	100	6	0.75	4,000	Rockwell C42	DIN 7346, ISO 13337	10	000000000	000000


	100	6 to 6.2	1.2	5,800	Rockwell C42	DIN 1481, ISO 8752	10	000000000	00000




			8 mm Diameter

			100	8	0.75	5,300	Rockwell C42	DIN 7346, ISO 13337	5	000000000	00000


			100	8 to 8.25	1.5	9,600	Rockwell C42	DIN 1481, ISO 8752	5	000000000	0000




					10 mm Diameter

					100	10	1	5,300	Rockwell C42	DIN 7346, ISO 13337	1	000000000	0000


					100	10 to 10.3	2	15,700	Rockwell C42	DIN 1481, ISO 8752	5	000000000	00000




							12 mm Diameter

							100	12	1	10,700	Rockwell C42	DIN 7346, ISO 13337	1	000000000	0000


							Corrosion-Resistant 18-8 Stainless Steel







											8 mm Diameter

											100	8 to 8.25	1.5	Not Rated	Not Rated	DIN 1481, ISO 8752	1	000000000	0000




													10 mm Diameter

													100	10 to 10.3	2	Not Rated	Not Rated	DIN 1481, ISO 8752	1	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.

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







	10 mm Diameter

	100	10.000 to 10.100	13,900	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	1	000000000	00000