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 5930-01-256-3261
NSN 5998-00-318-9987
NSN 6150-00-279-9337
NSN 6645-00-476-6033
NSN 5935-01-275-7958
NSN 6610-00-130-6074
NSN 7035-01-510-8787
NSN 5835-01-044-2628
NSN 5999-01-412-6503
NSN 5925-00-116-8706
NSN 6130-01-075-3979
NSN 6685-01-492-6556