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 5905-01-650-8390
NSN 5975-01-129-6217
NSN 7035-00-420-1310
NSN 6610-01-308-6148
NSN 5998-00-682-2146
NSN 5945-01-261-7849
NSN 6650-01-067-8946
NSN 5915-01-437-8858
NSN 6130-01-513-8597
NSN 5998-01-364-1402
NSN 5985-01-327-3601
NSN 5905-00-566-6550