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 5925-01-144-9135
NSN 6240-00-578-7422
NSN 4140-01-526-9136
NSN 6240-01-356-6911
NSN 5996-01-548-7746
NSN 5985-01-469-6116
NSN 5895-01-109-6853
NSN 5990-00-532-2641
NSN 4140-01-586-9605
NSN 5975-00-683-5869
NSN 5935-01-244-1833
NSN 5975-01-284-8669