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 6105-00-794-3597
NSN 6610-01-181-4398
NSN 5910-01-188-2738
NSN 5945-01-351-7229
NSN 5965-00-457-2496
NSN 5998-00-256-8304
NSN 5935-01-426-3677
NSN 6110-01-507-7015
NSN 5925-01-229-2855
NSN 6645-00-912-0248
NSN 5999-01-510-4358
NSN 5975-00-394-2545