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 6685-01-142-3201
NSN 5910-01-453-7160
NSN 6620-00-054-4778
NSN 5945-00-409-0941
NSN 6610-01-461-3850
NSN 6145-01-386-6762
NSN 5895-00-834-2110
NSN 5895-01-591-0192
NSN 5835-01-659-5206
NSN 5930-01-567-3920
NSN 6650-01-500-9638
NSN 5855-00-631-4565