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 6650-01-003-6467
NSN 6320-01-532-7491
NSN 5950-01-424-2019
NSN 5998-01-020-8143
NSN 6685-01-327-3195
NSN 5905-00-125-3517
NSN 6145-00-730-3933
NSN 6110-00-072-9394
NSN 4140-01-169-9592
NSN 5975-00-176-1959
NSN 2925-00-096-5526
NSN 6135-00-269-5843