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 6150-01-240-2320
NSN 5950-01-446-6484
NSN 6240-01-316-4657
NSN 6130-01-513-2553
NSN 4140-01-551-1125
NSN 5905-00-762-2338
NSN 5998-01-382-5827
NSN 5999-00-737-8862
NSN 5965-01-121-6135
NSN 5915-00-839-0031
NSN 5975-00-348-5620
NSN 5895-01-227-4742