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 5998-00-776-0479
NSN 6110-01-199-0172
NSN 5910-01-297-4152
NSN 5950-00-849-3684
NSN 6240-01-576-9120
NSN 5999-01-634-0576
NSN 5920-01-199-2931
NSN 6610-01-179-0116
NSN 6620-00-905-8530
NSN 6320-00-456-2092
NSN 5935-01-291-0816
NSN 6240-00-603-6662