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 6145-00-901-7784
NSN 6610-01-503-5656
NSN 5930-01-398-8547
NSN 6220-01-648-1569
NSN 6135-01-487-6275
NSN 5985-01-557-5371
NSN 7035-01-501-5938
NSN 5920-01-096-1864
NSN 7035-00-358-0470
NSN 5950-01-278-0655
NSN 5895-00-472-9829
NSN 2925-00-912-3993