QQ-W-412, FEDERAL SPECIFICATION: WIRE, STEEL, ALLOY (GENERAL PURPOSE QUALITY), FOR MECHANICAL SPRINGS (07-APR-1959)

QQ-W-412, FEDERAL SPECIFICATION: WIRE, STEEL, ALLOY (GENERAL PURPOSE QUALITY), FOR MECHANICAL SPRINGS (07-APR-1959)., This specification covers two compositions, of two types, of uncoated, round (0.020 to 0.500 inched in diameter) alloy-steel wire for the manufacture of mechanical springs subjected to mildly elevated temperatures.