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 5855-01-335-8907
NSN 6610-01-429-7267
NSN 5985-01-578-2216
NSN 5925-01-419-6618
NSN 5930-01-252-8687
NSN 5950-01-381-4866
NSN 5835-01-228-8666
NSN 6135-01-388-8376
NSN 5925-01-337-2001
NSN 6105-01-400-0895
NSN 5985-00-773-9032
NSN 5935-00-840-6365