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 6150-01-020-2569
NSN 5998-00-449-8415
NSN 6130-00-823-8481
NSN 6220-01-305-6114
NSN 5925-00-792-9073
NSN 5905-01-445-5049
NSN 5975-01-220-2949
NSN 5950-01-135-9860
NSN 5935-01-415-2885
NSN 6220-01-534-4425
NSN 4140-01-229-5143
NSN 6110-01-609-3479