A nut, flat on top and bottom having 6 flat sides. For items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. See also locknut, tube fitting. For items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
NSN 5905-01-127-1861
NSN 5960-01-005-2568
NSN 6620-01-112-6440
NSN 5910-01-444-4096
NSN 6105-01-583-1231
NSN 5945-01-029-3296
NSN 5998-01-603-9961
NSN 5960-01-147-3764
NSN 5975-01-600-7435
NSN 6105-01-365-1386
NSN 2925-01-380-0869
NSN 6135-00-643-4843