MS9177B (NOTICE 1), MILITARY STANDARD: SCREW, MACHINE - CRES, DOUBLE HEXAGON, EXTENDED WASHER HEAD, .138-40 (06 OCT 1998)

MS9177B (NOTICE 1), MILITARY STANDARD: SCREW, MACHINE - CRES, DOUBLE HEXAGON, EXTENDED WASHER HEAD, .138-40 (06 OCT 1998)., MS9177 is inactive for new design and is no longer used except for replacement purposes.