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 6130-01-553-5332
NSN 6610-00-225-9886
NSN 6620-00-679-5830
NSN 6150-01-406-5844
NSN 6150-01-365-3705
NSN 6650-01-042-9360
NSN 5960-01-495-0859
NSN 5835-01-350-0566
NSN 2925-00-118-4887
NSN 5975-01-400-0627
NSN 5855-00-288-1408
NSN 6650-01-659-5594