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 5999-01-254-3884
NSN 5910-01-195-3237
NSN 5910-01-188-9002
NSN 6320-01-476-7702
NSN 6130-01-352-5644
NSN 5990-00-813-2254
NSN 6145-01-072-3352
NSN 6105-00-104-6853
NSN 5915-00-257-3178
NSN 6110-01-084-4215
NSN 6135-01-326-2536
NSN 5998-01-427-1087