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 5915-00-456-0873
NSN 5855-00-188-6747
NSN 6610-01-103-4627
NSN 5905-01-506-9949
NSN 5999-01-007-9543
NSN 6620-01-272-7831
NSN 6645-01-365-8020
NSN 5999-01-082-4488
NSN 5990-00-249-7887
NSN 6650-01-075-5104
NSN 5999-01-300-0344
NSN 5945-01-322-5561