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 5930-01-548-9648
NSN 6610-01-450-2715
NSN 6135-00-145-8884
NSN 5910-01-005-4978
NSN 6145-01-161-2668
NSN 7035-00-455-7666
NSN 6150-01-303-9462
NSN 5895-00-468-4103
NSN 5998-00-676-1270
NSN 6110-01-396-7693
NSN 5920-01-062-7106
NSN 5985-01-076-4710