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 5930-01-170-4426
NSN 5975-01-375-6354
NSN 5985-00-810-1298
NSN 5905-01-264-3330
NSN 5930-01-567-2711
NSN 6145-00-581-1629
NSN 5965-01-593-2740
NSN 5905-00-602-9780
NSN 6105-01-553-5777
NSN 6150-00-112-2458
NSN 2925-01-629-9416
NSN 6135-01-067-8331