AN420 (REV. 3) (NOTICE 1), AIR FORCE - NAVY AERONAUTICAL STANDARD: RIVET AND COUNTERSUNK HEAD (10 DEC 1965)[S/S BY AN427 & MS20427]
AN420 (REV. 3) (NOTICE 1), AIR FORCE - NAVY AERONAUTICAL STANDARD: RIVET AND COUNTERSUNK HEAD (10 DEC 1965)[S/S BY AN427 & MS20427].