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 6240-01-431-5790
NSN 5930-01-454-1032
NSN 5905-01-335-8912
NSN 6620-00-580-3499
NSN 5999-01-005-2826
NSN 5985-00-998-1563
NSN 5985-01-359-5084
NSN 5910-01-525-7889
NSN 6610-00-023-0076
NSN 5975-00-156-5737
NSN 5925-00-790-4903
NSN 5975-00-164-2685