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 5855-01-201-4857
NSN 5950-01-333-0610
NSN 5935-01-119-0576
NSN 5975-00-949-9005
NSN 5945-01-012-2448
NSN 5985-01-515-7773
NSN 5975-01-308-5624
NSN 6645-01-343-6077
NSN 5835-00-594-4921
NSN 5935-01-013-1557
NSN 5930-01-444-4074
NSN 6610-00-060-0871