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 6320-01-129-9656
NSN 6240-00-113-1912
NSN 5990-01-024-9659
NSN 6610-01-099-9710
NSN 6650-00-486-7924
NSN 4140-01-065-1884
NSN 5975-00-847-1244
NSN 5910-00-816-2481
NSN 6620-01-230-0197
NSN 5990-01-400-3299
NSN 6610-01-399-7613
NSN 6220-00-601-3458