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 5910-01-345-4157
NSN 5975-01-135-8709
NSN 6130-01-032-4958
NSN 5998-01-194-7317
NSN 6130-00-759-1409
NSN 5950-01-359-1931
NSN 5996-01-256-2073
NSN 5930-01-634-0659
NSN 5835-00-614-0650
NSN 6150-00-628-7234
NSN 6610-01-161-4835
NSN 5945-01-245-9358