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 6650-00-695-0304
NSN 6685-01-597-3393
NSN 6220-00-383-9402
NSN 6650-01-111-2036
NSN 6240-01-294-3988
NSN 2925-01-196-6187
NSN 5905-01-490-0896
NSN 6610-00-116-5725
NSN 5925-00-476-4868
NSN 7035-01-514-4617
NSN 5855-01-278-8922
NSN 6105-01-584-6319