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 6240-01-304-4741
NSN 5965-01-474-5654
NSN 6240-00-185-8367
NSN 5835-00-373-2671
NSN 5855-01-558-4532
NSN 5905-00-850-3429
NSN 5999-00-340-0296
NSN 5915-00-153-4805
NSN 5935-01-517-3849
NSN 5960-00-153-7115
NSN 5930-00-512-7424
NSN 5935-01-530-0362