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 5910-01-537-2037
NSN 6130-01-320-2655
NSN 5999-01-336-1942
NSN 5950-00-404-6241
NSN 6135-00-125-5265
NSN 5935-00-014-0390
NSN 5895-00-081-2219
NSN 5990-01-510-1430
NSN 6645-00-099-6913
NSN 5950-00-205-2932
NSN 2925-00-887-7092
NSN 6645-00-432-3420