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 6320-01-019-1028
NSN 6645-00-171-9639
NSN 2925-01-123-5856
NSN 5990-01-052-9343
NSN 5895-01-325-7027
NSN 5910-01-495-6595
NSN 5975-01-617-6972
NSN 6620-01-032-3937
NSN 5835-00-617-3578
NSN 6610-01-284-6968
NSN 5925-00-504-0996
NSN 5998-01-018-7213