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 5999-01-014-0872
NSN 5905-00-192-0180
NSN 5998-00-541-8792
NSN 5835-00-510-0890
NSN 6240-00-782-1407
NSN 5985-01-504-4350
NSN 5996-01-535-6443
NSN 5935-01-264-6578
NSN 2925-01-058-1718
NSN 5985-00-820-9265
NSN 6610-00-676-8419
NSN 5935-01-014-7837