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 6150-01-261-0094
NSN 2925-01-391-9247
NSN 5835-01-259-0859
NSN 5910-01-500-8329
NSN 5915-01-643-5072
NSN 5985-01-448-1278
NSN 5965-01-122-7477
NSN 5965-00-100-1291
NSN 2925-01-461-6372
NSN 5996-00-104-8293
NSN 5935-00-306-0987
NSN 6620-00-351-9949