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 6620-01-392-7191
NSN 5895-01-010-1742
NSN 6135-00-269-5843
NSN 5998-00-029-3789
NSN 5855-01-488-4209
NSN 2925-01-053-0886
NSN 6220-01-513-4352
NSN 5998-01-187-7930
NSN 5999-00-317-6262
NSN 5990-00-818-1078
NSN 5990-01-537-1124
NSN 5935-01-050-8417