Material:

Wire, Steel, Music in accordance with ASTM A228.
Wire, Steel, Corrosion Resisting in accordance with ASTM A580 and ASTM A313.

Protective Coating:

Cadmium plating in accordance with QQ-P-416, Type II, Class 2.
Zinc coating in accordance with ASTM B633, Type II, Fe/Zn5.
Passivation treatment in accordance with QQ-P-35.

Ends:

Squared and ground.

Tolerances:

Outside diameter “OD” .120 to .240 +- .005, .300 to .500 +- .008, .550 to .850 +- .015.
Ends to be square within 3 degrees with axis. (Grade B of procurement specification)
Spring rate “R” +- 10%.
Wire diameter “d” in accordance with material specifications.
Deflection “F” +- 10%.

Dimensions:

Al dimensions are in inches.

Optimum Spring manufactures and stocks MS24585 compression springs Organized by Material and Finish: Music Wire MW + Cadmium MW + Zinc Stainless Steel MS24585-1 MS24585-1001 MS24585-2010 MS24585-C1 MS24585-527 MS24585-1527 MS24585-2507 MS24585-C527

Part Number:

The MS part number consists of the MS number, plus the dash number. Example MS24585 -1.

Notes:

1. The Part Identification Number (PIN) for MS24585D and the part number for AS24585 are identical.
2. Free length “L”, active coils “N”, and deflection per coil “F” are for reference use only.
3. Load “P” must be attained at a compressed length determined by subtracting deflection “F” (with tolerance) from the free length “L”. For corrosion-resisting steel multiply “P” by .833.
4. Spring values shown are for music wire and are based on a service life of 50,000 cycles at .50 stress range.
5. To determine safe working deflection under other operating conditions, or when corrosion-resisting steel is used, multiply “F” by the appropriate factor shown in the table below. P1 = load at assembled length and P2 = final load.
6. To determine load “P” at any deflection other than “F” multiply the proposed deflection by the rate “R”.
7. When steel, corrosion-resisting is used the value for rate “R” must be corrected by multiplying “R” by .833.
8. Music wire springs are not recommended for applications where temperature exceeds 250F. Corrosion-resisting steel springs are not recommended foe applications where temperature exceeds 500F.

Table 1 - Correction Factor for stress range life cycles and spring material

Material	(P2-P1)/P2	Cycles
		5,000	10,000	50,000	100,000	Infinite
Music Wire	.25	1.28	1.23	1.11	1.06	.95
	.50	1.23	1.16	1.00	.93	.76
	.75	1.21	1.12	.93	.84	.65
	1.00	1.17	1.08	.86	.77	.55
Corrosion Resisting Steel	.25	.92	.90	.83	.81	.77
	.50	.88	.84	.76	.72	.63
	.75	.85	.80	.68	.63	.51
	1.00	.83	.76	.61	.55	.41