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 6130-01-510-5002
NSN 4140-01-429-9060
NSN 5935-00-488-5832
NSN 5905-00-915-5839
NSN 5855-01-580-1520
NSN 5996-01-566-0344
NSN 6110-01-633-9660
NSN 6135-01-186-4010
NSN 5910-01-139-6090
NSN 6220-01-523-4544
NSN 6105-00-962-9003
NSN 6685-01-128-5278