FF-S-85C, FEDERAL SPECIFICATION: SCREW, CAP, SLOTTED AND HEXAGON HEAD (05 MAY 1969) [SUPERSEDING FF-S-91]
FF-S-85C, FEDERAL SPECIFICATION: SCREW, CAP, SLOTTED AND HEXAGON HEAD (05 MAY 1969) [SUPERSEDING FF-S-91]., This specification covers the types and styles of slotted and hexagon head cap screws, classified in 1.2.1 (see 6.1).