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 5975-00-241-6636
NSN 5855-01-431-3531
NSN 6145-00-905-3236
NSN 5905-01-277-8516
NSN 6150-01-412-1123
NSN 5960-00-226-8443
NSN 5990-00-694-4086
NSN 6145-00-423-1563
NSN 5910-00-192-2265
NSN 5930-01-406-3506
NSN 5920-00-958-7202
NSN 5999-00-624-4242