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 4140-01-513-9139
NSN 5925-01-481-3442
NSN 2925-01-027-1293
NSN 5945-00-385-3683
NSN 6130-01-573-9334
NSN 6110-01-003-9614
NSN 5950-01-042-3789
NSN 5855-01-574-3456
NSN 6150-01-524-0390
NSN 4140-00-925-9218
NSN 5985-01-027-3460
NSN 5895-01-614-3131