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 5915-01-540-4491
NSN 5855-01-523-8926
NSN 6105-01-627-2198
NSN 2925-01-283-6740
NSN 6620-01-444-4048
NSN 6220-01-117-6652
NSN 5930-01-376-9291
NSN 5945-01-591-7036
NSN 6135-00-073-8939
NSN 5996-01-445-5528
NSN 6130-00-567-4624
NSN 5985-01-123-4214