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 5905-01-603-2424
NSN 5855-01-327-2681
NSN 5999-01-173-9031
NSN 5960-01-285-6521
NSN 6130-00-904-3374
NSN 5950-01-462-5752
NSN 5915-01-181-0053
NSN 5945-01-409-1947
NSN 5960-01-564-5044
NSN 5905-01-519-9021
NSN 6145-00-257-6820
NSN 5835-01-013-9321