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 6610-00-647-3830
NSN 5965-00-539-7778
NSN 6150-00-901-7264
NSN 5960-01-388-1988
NSN 6145-01-114-3879
NSN 6135-01-127-0173
NSN 6130-00-528-7838
NSN 6610-01-364-0294
NSN 7035-00-104-7613
NSN 5950-01-240-2943
NSN 5855-00-937-2326
NSN 7035-00-064-7008