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 5960-01-448-2282
NSN 6620-01-357-0757
NSN 6145-01-495-0942
NSN 6645-01-468-4990
NSN 6110-01-325-7985
NSN 5920-00-421-6448
NSN 5960-00-263-0106
NSN 5996-00-125-4570
NSN 6135-01-579-3534
NSN 5999-01-221-2922
NSN 5920-01-361-3635
NSN 5975-01-216-4289