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 6240-00-821-5125
NSN 6150-00-942-4917
NSN 6240-01-531-4619
NSN 7035-01-474-9537
NSN 6130-00-580-3725
NSN 5998-01-025-6764
NSN 5895-00-900-5449
NSN 6150-01-231-1008
NSN 6110-01-306-1934
NSN 6110-00-705-5863
NSN 5910-01-306-5250
NSN 6320-01-029-4220