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 5930-00-277-4704
NSN 6645-00-664-4665
NSN 6320-01-609-9763
NSN 6620-00-596-1951
NSN 6645-01-496-9868
NSN 6150-00-299-6678
NSN 6685-00-098-1771
NSN 6130-01-523-0463
NSN 5985-01-164-9947
NSN 5975-00-007-1925
NSN 6650-01-584-9606
NSN 5990-01-570-5471