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 5960-00-252-1429
NSN 6220-00-676-0904
NSN 6110-01-076-4060
NSN 5855-01-098-9038
NSN 5925-01-219-2316
NSN 6620-00-568-3947
NSN 5998-01-347-1976
NSN 6135-00-728-9860
NSN 6150-01-215-9997
NSN 5895-01-422-6294
NSN 5935-01-541-0551
NSN 5920-01-546-7966