16mm 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



	16	3.7	2.7	0.5	9.8	1.8	0.29	Closed	DIN 2095	5	00000000	000000


	16	5.41	4.6	0.41	5.9	0.72	0.07	Closed	—	5	00000000	00000
	16	8.63	7.37	0.63	5.1	1.8	0.17	Closed	DIN 2095	5	00000000	00000


	Highly Corrosion-Resistant 316 Stainless Steel



			16	3.7	2.7	0.5	10.3	1.6	0.29	Closed and Ground	—	1	00000000	0000


			16	5.4	4.6	0.4	7.5	0.6	0.07	Closed	—	1	00000000	0000
			16	8.63	7.37	0.63	7.5	1.4	0.17	Closed and Ground	—	1	00000000	0000

Extension Spring Stud Anchors

A black-oxide finish provides these steel anchors with mild corrosion resistance. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection.

	Thread
	Size	Min. Lg., mm	Spacing	Lg., mm	Dia., mm	Hole Dia., mm		Each
Black-Oxide Steel



		M3.5 × 0.6 mm	10	Coarse	16	3.5	2	0000000	00000

Corrosion-Resistant Extension Spring Stud Anchors

These stainless steel stud anchors offer excellent corrosion resistance. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection.

	Thread
	Size	Min. Lg., mm	Spacing	Lg., mm	Dia., mm	Hole Dia., mm		Each
18-8 Stainless Steel



		M3.5 × 0.6 mm	10	Coarse	16	3.5	2	000000000	000000

Swiveling Extension Spring Stud Anchors

A black-oxide finish provides these steel anchors with mild corrosion resistance. The head swivels 360° so the spring stays straight and properly coiled. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection. To make tightening easier, anchors have a hex socket on the bottom and wrench flats at the top of the threads.

	Thread
	Size	Min. Lg., mm	Spacing	Lg., mm	Dia., mm	Hole Dia., mm	Hex Size, mm		Each
Black-Oxide Steel



		M3.5 × 0.6 mm	10	Coarse	16	3.5	2	0.9	000000000	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.

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







				2 mm Diameter

				16	2	0.2	330	Rockwell C42	DIN 7346, ISO 13337	100	000000000	000000


				16	2 to 2.1	0.4	600	Rockwell C42	ISO 8752	200	000000000	00000




						2.5 mm Diameter

						16	2.5	0.25	530	Rockwell C42	DIN 7346, ISO 13337	50	000000000	00000




								3 mm Diameter

								16	3	0.3	780	Rockwell C42	DIN 7346, ISO 13337	100	000000000	00000


								16	3 to 3.1	0.6	1,400	Rockwell C42	ISO 8752	200	000000000	00000




										4 mm Diameter

										16	4	0.5	1,700	Rockwell C42	DIN 7346, ISO 13337	50	000000000	0000


										16	4 to 4.2	0.8	2,500	Rockwell C42	ISO 8752	100	000000000	00000




												5 mm Diameter

												16	5	0.5	2,300	Rockwell C42	DIN 7346, ISO 13337	50	000000000	00000


												16	5 to 5.2	1	3,900	Rockwell C42	ISO 8752	100	000000000	00000




														6 mm Diameter

														16	6	0.75	4,000	Rockwell C42	DIN 7346, ISO 13337	50	000000000	00000


														16	6 to 6.2	1.2	5,800	Rockwell C42	ISO 8752	100	000000000	00000




8 mm Diameter

16	8															0.75	5,300	Rockwell C42	DIN 7346, ISO 13337	25	000000000	00000




		10 mm Diameter

		16	10													1	5,300	Rockwell C42	DIN 7346, ISO 13337	10	000000000	0000




																12 mm Diameter

																16	12	1	10,700	Rockwell C42	DIN 7346, ISO 13337	10	000000000	00000




																13 mm Diameter

																16	13	1.2	14,800	Rockwell C42	DIN 7346, ISO 13337	5	000000000	0000




																16 mm Diameter

																16	16	1.5	22,000	Rockwell C42	DIN 7346, ISO 13337	1	000000000	0000


																Corrosion-Resistant 18-8 Stainless Steel







																		2 mm Diameter

																		16	2 to 2.1	0.4	Not Rated	Not Rated	DIN 1481, ISO 8752	25	000000000	0000




																		3 mm Diameter

																		16	3 to 3.1	0.6	Not Rated	Not Rated	DIN 1481, ISO 8752	25	000000000	0000




													4 mm Diameter

													16						4 to 4.2	0.8	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000




																				5 mm Diameter

																				16	5 to 5.2	1	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000




6 mm Diameter

16	6 to 6.2																			1.2	Not Rated	Not Rated	DIN 1481, ISO 8752	10	000000000	0000

Corrosion-Resistant Swiveling Extension Spring Stud Anchors

These stainless steel stud anchors offer excellent corrosion resistance. The head swivels 360° so the spring stays straight and properly coiled. Attach an extension spring to an anchor and then thread the anchor into your part for a secure connection. To make tightening easier, anchors have a hex socket on the bottom and wrench flats at the top of the threads.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

	Thread
	Size	Min. Lg., mm	Spacing	Lg., mm	Dia., mm	Hole Dia., mm	Hex Size, mm		Each
18-8 Stainless Steel



		M3.5 × 0.6 mm	10	Coarse	16	3.5	2	0.9	000000000	000000

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







			2 mm Diameter

			16	2.000 to 2.100	550	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	50	000000000	00000




					2.5 mm Diameter

					16	2.500 to 2.600	850	Rockwell C43	DIN 7343, ISO 8750	50	000000000	00000




							3 mm Diameter

							16	3.000 to 3.100	1,200	Rockwell C43	DIN 7343, ISO 8750	50	000000000	00000




									4 mm Diameter

									16	4.000 to 4.100	2,100	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	25	000000000	0000




											5 mm Diameter

											16	5.000 to 5.100	3,300	Rockwell C43	ASME B18.8.3M, DIN 7343, ISO 8750	25	000000000	00000




													6 mm Diameter

													16	6.000 to 6.100	4,900	Rockwell C43	DIN 7343, ISO 8750	25	000000000	00000


													Corrosion-Resistant 18-8 Stainless Steel







																	2.5 mm Diameter

																	16	2.500 to 2.600	650	Not Rated	DIN 7343, ISO 8750	25	000000000	00000




																			3 mm Diameter

16																			3.000 to 3.100	900	Not Rated	DIN 7343, ISO 8750	25	000000000	00000




	6 mm Diameter

	16	6.000 to 6.100																	3,700	Not Rated	DIN 7343, ISO 8750	5	000000000	0000