MS20221E (NOTICE 1), MILITARY STANDARD: PULLEY, GROOVE, HEAVY DUTY, CONTROL, AIRCRAFT (05 MAY 1998) [SUPERSEDED BY MIL-DTL-7034/3]
MS20221E (NOTICE 1), MILITARY STANDARD: PULLEY, GROOVE, HEAVY DUTY, CONTROL, AIRCRAFT (05 MAY 1998) [SUPERSEDED BY MIL-DTL-7034/3].