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 6145-01-440-6481
NSN 6150-01-406-3907
NSN 5965-00-020-1951
NSN 6240-01-507-3609
NSN 6135-01-171-9299
NSN 5965-00-193-2406
NSN 5855-00-160-2286
NSN 2925-00-221-8529
NSN 5935-00-699-8815
NSN 5965-01-607-0632
NSN 6145-01-498-0113
NSN 6240-01-050-8306