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 6105-00-804-1749
NSN 5960-01-254-3541
NSN 6145-01-176-4047
NSN 6130-01-457-8021
NSN 5855-01-447-3137
NSN 5985-01-254-4534
NSN 5950-00-957-7766
NSN 5996-01-391-7489
NSN 5999-00-185-8285
NSN 5935-01-056-8580
NSN 7035-01-317-7186
NSN 6130-01-449-5086