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 6150-01-545-3031
NSN 5905-00-246-4639
NSN 6220-00-912-0226
NSN 5835-00-415-6421
NSN 5990-01-581-5103
NSN 5855-01-508-4654
NSN 5960-01-495-0834
NSN 5905-00-155-4767
NSN 4140-01-120-4460
NSN 5996-00-088-8891
NSN 5895-01-612-2705
NSN 6220-01-245-0310