AN149151 THRU AN149250 (REV. 2), AIR FORCE-NAVY AERONAUTICAL STANDARD: BOLT-SOCKET HEAD, 6 HOLES DRILLED, .5625-18 (01 AUG 1958)
AN149151 THRU AN149250 (REV. 2), AIR FORCE-NAVY AERONAUTICAL STANDARD: BOLT-SOCKET HEAD, 6 HOLES DRILLED, .5625-18 (01 AUG 1958).