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 5999-01-286-1590
NSN 5965-01-523-7796
NSN 5910-00-905-6425
NSN 5950-01-597-6137
NSN 5990-00-269-2226
NSN 5950-00-253-0680
NSN 5925-01-242-9945
NSN 5935-01-253-0093
NSN 5960-01-495-0859
NSN 5998-00-359-7814
NSN 6645-01-576-6733
NSN 6110-01-055-3507