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 5996-01-100-3731
NSN 5915-01-366-9520
NSN 6240-01-336-8337
NSN 5935-00-100-6038
NSN 5999-01-267-9028
NSN 5999-01-141-7721
NSN 5910-01-303-7088
NSN 5975-01-153-1248
NSN 6320-01-255-2096
NSN 5960-00-660-3669
NSN 4140-01-383-4091
NSN 5935-00-978-4541