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 6645-01-116-2037
NSN 5895-01-523-0237
NSN 6645-01-457-8642
NSN 5925-00-421-8880
NSN 5975-01-617-1988
NSN 6105-01-171-9255
NSN 5960-00-900-6705
NSN 6650-00-248-4895
NSN 5935-01-412-6935
NSN 5930-01-412-7759
NSN 6145-00-699-1637
NSN 5905-00-882-2213