QQ-S-764 is a Federal Specification for Stainless Steel
QQ-S-764B (NOTICE 1), FEDERAL SPECIFICATION: STEEL BAR, CORROSION RESISTING, FREE MACHINING (08 SEP 1975) [S/S BY ASTM A484 & ASTM A582]
This specification has been superseded by ASTM A484 and ASTM A582