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 6620-00-801-8885
NSN 5925-00-718-7530
NSN 6220-01-112-6919
NSN 5935-00-798-7396
NSN 2925-00-215-0106
NSN 5965-01-445-0651
NSN 5998-01-658-5343
NSN 5985-01-633-7240
NSN 5945-01-567-7606
NSN 6620-01-383-7519
NSN 6135-00-906-0984
NSN 5925-01-528-4970