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 5990-00-177-2924
NSN 6685-01-123-9275
NSN 6685-00-783-4827
NSN 5925-01-338-3161
NSN 6645-00-114-2678
NSN 5996-01-303-1930
NSN 6650-01-290-8705
NSN 5905-00-014-2438
NSN 6135-01-243-5797
NSN 6150-01-118-6703
NSN 5915-01-262-2950
NSN 5855-00-999-1419