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 5996-00-811-8120
NSN 5975-00-288-5877
NSN 5950-01-424-0068
NSN 6110-01-358-9421
NSN 5935-01-287-2357
NSN 5930-01-534-1951
NSN 5925-01-609-9497
NSN 5835-00-814-1359
NSN 5950-01-013-9013
NSN 6220-00-012-0027
NSN 5855-00-494-9581
NSN 2925-01-415-0264