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 6685-01-386-6547
NSN 6150-01-424-2004
NSN 5930-01-145-8741
NSN 6135-00-519-1325
NSN 6135-01-480-4579
NSN 5935-01-113-0626
NSN 6645-00-078-5126
NSN 5975-01-522-6106
NSN 6685-01-183-1799
NSN 5835-00-198-4936
NSN 6240-00-172-8451
NSN 5990-00-226-7894