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 5910-01-088-6848
NSN 6145-01-461-8062
NSN 6645-01-188-0213
NSN 6150-01-233-6584
NSN 5998-00-146-2281
NSN 4140-01-050-8096
NSN 6220-01-415-3115
NSN 5960-01-077-9600
NSN 5965-01-432-1943
NSN 6610-01-192-2467
NSN 4140-01-268-0500
NSN 5855-00-494-9581