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 6685-00-372-4670
NSN 6320-01-227-2648
NSN 6620-01-179-2657
NSN 6610-00-883-1034
NSN 6220-00-172-7641
NSN 5930-01-248-5830
NSN 5855-00-782-7714
NSN 5905-01-597-6129
NSN 2925-00-185-1618
NSN 5895-00-155-4578
NSN 5985-00-186-0732
NSN 5985-00-492-3212