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 5990-00-170-4239
NSN 5975-01-447-3270
NSN 5998-01-452-3559
NSN 5935-01-481-1104
NSN 5950-01-145-9885
NSN 6145-00-112-9476
NSN 5975-01-212-3474
NSN 5975-01-468-9570
NSN 5990-01-181-9886
NSN 5990-00-594-7291
NSN 5915-01-496-2314
NSN 6145-00-078-9917