MS51869, MILITARY STANDARD, SCREW, TAPPING HIGH PERFORMANCE, THREAD ROLLING, TYPES SF, SW AND TT, HEXAGON WASHER HEAD (29 SEP 1972)
MS51869, MILITARY STANDARD, SCREW, TAPPING HIGH PERFORMANCE, THREAD ROLLING, TYPES SF, SW AND TT, HEXAGON WASHER HEAD (29 SEP 1972).