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 5990-01-650-9034
NSN 6110-01-645-6204
NSN 5975-01-094-6250
NSN 5905-00-969-1420
NSN 6150-00-113-8619
NSN 6610-00-893-0893
NSN 5999-00-864-0341
NSN 5965-01-273-3055
NSN 6650-01-546-7632
NSN 6110-00-260-0130
NSN 6145-00-981-9528
NSN 5999-00-801-9331