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 5855-01-224-7975
NSN 5895-01-170-4355
NSN 5920-01-212-1536
NSN 6645-00-033-8714
NSN 4140-01-499-7373
NSN 6145-01-108-9494
NSN 6135-01-484-8637
NSN 6105-00-412-9342
NSN 5999-00-400-4194
NSN 5965-00-834-6298
NSN 5835-00-681-0005
NSN 5945-01-414-2383