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 6150-00-947-5736
NSN 5835-01-251-7301
NSN 6320-01-335-8336
NSN 6320-00-937-5625
NSN 5945-01-014-5883
NSN 5905-00-684-4999
NSN 5935-01-430-2481
NSN 5855-01-236-9645
NSN 5935-01-287-0558
NSN 5998-00-386-7051
NSN 5855-00-337-3679
NSN 6645-00-613-2378