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 6650-00-446-8787
NSN 5950-01-376-3009
NSN 6650-01-213-1231
NSN 6220-01-329-4975
NSN 6240-01-060-6037
NSN 5985-00-296-7656
NSN 5910-01-264-2748
NSN 5910-00-463-3525
NSN 4140-00-944-1011
NSN 2925-01-660-0669
NSN 2925-00-321-2032
NSN 6150-01-367-1915