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 6145-00-279-7136
NSN 5945-01-224-9046
NSN 6610-00-102-5410
NSN 5965-01-593-9931
NSN 5999-01-504-0270
NSN 5965-00-486-7907
NSN 5930-01-610-0606
NSN 6110-01-046-6637
NSN 6110-01-126-8402
NSN 5998-01-003-2895
NSN 5950-01-367-1060
NSN 2925-00-075-2714