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 5835-00-993-5406
NSN 6105-01-439-6614
NSN 6130-00-119-3149
NSN 6320-00-646-3311
NSN 5915-01-648-2126
NSN 5998-00-224-4809
NSN 5920-01-352-0655
NSN 7035-01-374-4044
NSN 5998-00-686-2152
NSN 5920-01-054-7230
NSN 6150-00-197-8431
NSN 5960-01-005-2568