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 6645-01-352-5449
NSN 5935-01-649-7513
NSN 6610-01-492-9888
NSN 5990-01-210-5474
NSN 5895-01-533-4803
NSN 5895-00-534-3163
NSN 5998-01-610-4146
NSN 5895-00-957-6277
NSN 6130-00-573-8807
NSN 6650-00-164-7480
NSN 6650-01-535-4276
NSN 5905-01-118-9067