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 5975-01-481-3328
NSN 5999-01-125-9354
NSN 5950-00-759-8837
NSN 5835-01-416-6449
NSN 6320-00-857-4073
NSN 6320-01-052-2118
NSN 5950-01-627-6473
NSN 6240-01-383-8579
NSN 5930-00-505-1963
NSN 6685-00-256-6591
NSN 5985-01-650-0539
NSN 6135-01-196-7399