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 5920-01-350-3163
NSN 6645-00-340-4795
NSN 5945-01-478-1271
NSN 5960-00-170-6916
NSN 5985-01-541-4427
NSN 4140-01-129-8885
NSN 5975-01-125-6777
NSN 6645-01-381-0656
NSN 6110-01-522-3489
NSN 5998-00-528-2352
NSN 6135-01-469-6429
NSN 6105-01-123-6123