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 5998-01-444-5544
NSN 6150-00-331-1463
NSN 6620-01-479-7221
NSN 6685-01-227-5471
NSN 5895-01-648-2670
NSN 5930-01-578-9909
NSN 5835-01-384-3206
NSN 6135-00-840-6451
NSN 5960-01-395-6939
NSN 5905-00-674-3245
NSN 5905-00-901-3249
NSN 5945-01-574-8391