MS21244B, MILITARY STANDARD: NUT, CASTELLATED, HEXAGON, COUNTERBORED ASSEMBLED WASHER, 450 DEG. F (FOR SELF RETAINING BOLTS) (28 AUG 1981) [SUPERSEDED BY NASM21244]

MS21244B, MILITARY STANDARD: NUT, CASTELLATED, HEXAGON, COUNTERBORED ASSEMBLED WASHER, 450 DEG. F (FOR SELF RETAINING BOLTS) (28 AUG 1981) [SUPERSEDED BY NASM21244].