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 6220-00-682-8292
NSN 6110-00-323-0289
NSN 4140-01-628-1904
NSN 7035-00-897-7567
NSN 5915-01-415-2477
NSN 5996-00-740-8315
NSN 6240-01-016-8140
NSN 6240-01-429-7830
NSN 5930-01-349-9492
NSN 5999-00-264-5655
NSN 5835-00-170-5238
NSN 6620-01-473-5163