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 5990-01-400-3299
NSN 5905-01-116-5406
NSN 6240-00-351-8564
NSN 6320-01-207-9038
NSN 5990-01-442-3520
NSN 5905-00-491-9072
NSN 6240-00-322-9928
NSN 5998-00-214-9577
NSN 6110-00-097-1053
NSN 6650-01-621-4138
NSN 5895-01-283-3436
NSN 6130-00-617-1934