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 5915-01-454-5650
NSN 6130-00-564-3622
NSN 6130-00-005-1633
NSN 5950-01-192-7337
NSN 6685-00-647-2263
NSN 5920-01-542-9143
NSN 5855-01-657-7657
NSN 5930-01-452-5220
NSN 5945-01-058-4435
NSN 5960-00-960-6805
NSN 6685-01-522-0375
NSN 6110-01-120-2836