38mm Springs | McMaster-Carr

With the Raymond color code, you'll always grab the die spring with the right load rating. The chrome-silicon steel is stronger than spring steel and handles repeated stress for longer periods of time. Rely on these springs for high-volume jobs, such as stamping and injection molding. A powder coating prevents rust in wet environments. The closed, ground ends create a flat surface that balances your load, even as it moves.

Metric

Image of Product. Side1 orientation. Die Springs. Color-Coded Die Springs.

Deflection @ Maximum Load—The percentage represents how much a spring compresses from its original length.

				Wire, mm
	For Hole Dia., mm	For Shaft Dia., mm	Lg., mm	Thk.	Wd.	Compressed Lg. @ Max. Load, mm	Deflection @ Max. Load	Max. Load, lb.	Spring Rate, lbf/mm	Material	End Type	Specs. Met		Each
Green (Light Load)



		10	5	38	0.99	1.78	24.7	35%	20	1.5	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N112	00000


		12.5	6	38	1.32	2.36	24.7	35%	40	3	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N117	0000
		16	8	38	1.75	2.77	24.7	35%	57	4.3	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N123	0000
		20	10	38	1.91	4.19	24.7	35%	99	7.4	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N128	0000
		25	12.5	38	2.54	5.46	24.7	35%	185	14	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N137	0000
		32	16	38	2.92	7.24	24.7	35%	280	21	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N142	00000


		Blue (Medium Load)



				10	5	38	1.17	1.85	26.6	30%	30	2.6	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N156	0000


				12.5	6	38	1.55	2.39	26.6	30%	54	4.8	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N161	0000
				16	8	38	2.06	3.12	26.6	30%	86	7.6	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N166	0000
				20	10	38	2.36	3.96	26.6	30%	140	13	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N17	0000
				25	12.5	38	2.92	5.54	26.6	30%	235	20	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N176	0000
				32	16	38	3.96	7.14	26.6	30%	470	41	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N179	00000


				Red (Heavy Load)



						10	5	38	1.37	1.83	28.5	25%	36	3.8	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N188	0000


						20	10	38	3.18	4.19	28.5	25%	275	29	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N198	0000
						25	12.5	38	4.01	5.61	28.5	25%	465	49	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N213	0000
						32	16	38	5.08	7.26	28.5	25%	825	87	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N216	00000


						Yellow (Extra-Heavy Load)



								10	5	38	1.50	2.03	30.4	20%	40	5.3	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N223	0000


								12.5	6	38	2.13	2.46	30.4	20%	61	8	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N226	0000
								16	8	38	2.79	3.20	30.4	20%	120	16	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N228	0000
								20	10	38	4.09	4.06	30.4	20%	300	39	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N231	0000
								25	12.5	38	4.95	5.49	30.4	20%	590	77	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N234	00000
								32	16	38	6.20	7.32	30.4	20%	900	120	Chrome Silicon Steel	Closed and Ground	ISO 10243	1804N237	00000

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

				38	14	2	52.7	7.35	36.87	2.12	1	3630N315	00000


				Hook End







								Corrosion-Resistant 302 Stainless Steel

								38	14	2	52.7	7.35	30.71	1.76	1	1942N595	00000

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.

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		Each
Black-Oxide Steel



		M8 × 1.25 mm	25	Coarse	38	8	5	9634K42	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.

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		Each
18-8 Stainless Steel



		M8 × 1.25 mm	25	Coarse	38	8	5	95907A200	000000

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.

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



		M8 × 1.25 mm	25	Coarse	38	8	5	2.5	96376A600	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



		M8 × 1.25 mm	25	Coarse	38	8	5	2.5	97745A200	000000