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 6110-00-435-8007
NSN 6110-01-371-3049
NSN 5910-00-122-3733
NSN 4140-01-275-5234
NSN 5985-01-145-4422
NSN 5998-01-301-8461
NSN 6145-01-130-5416
NSN 5960-01-150-8004
NSN 5935-00-104-5742
NSN 6320-00-313-9114
NSN 6130-01-657-2639
NSN 6145-01-206-2350