MS21224D, MILITARY SPECIFICATION SHEET: NUT, SELF-LOCKING, CASTELLATED, HEXAGON, COUNTERBORED, ASSEMBLED WASHER, 250 DEG. F, NON-METALLIC INSERT (FOR SELF-RETAINING BOLTS) (23 AUG 1993) [SUPERSEDED BY NASM21224]

MS21224D, MILITARY SPECIFICATION SHEET: NUT, SELF-LOCKING, CASTELLATED, HEXAGON, COUNTERBORED, ASSEMBLED WASHER, 250 DEG. F, NON-METALLIC INSERT (FOR SELF-RETAINING BOLTS) (23 AUG 1993) [SUPERSEDED BY NASM21224].