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 4140-01-058-3844
NSN 6145-01-568-3257
NSN 5960-01-452-1907
NSN 6145-00-054-8957
NSN 5905-00-418-0069
NSN 5950-01-476-9596
NSN 6220-01-386-4370
NSN 6320-01-264-4563
NSN 6320-00-115-0883
NSN 6620-01-203-4369
NSN 6130-01-272-9765
NSN 5996-00-293-4687