FF-S-92B, FEDERAL SPECIFICATION: SCREW, MACHINE, SLOTTED, CROSS RECESSED OR HEXAGON HEAD (27 AUG 1974)

FF-S-92B, FEDERAL SPECIFICATION: SCREW, MACHINE, SLOTTED, CROSS RECESSED OR HEXAGON HEAD (27 AUG 1974)., This specification was approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal Agencies. This specification covers slotted, cross-recessed, and hexagon head machine screws.