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 6650-01-112-3986
NSN 5895-01-474-8724
NSN 6620-00-492-4936
NSN 5960-01-408-6290
NSN 6620-01-552-4980
NSN 7035-00-252-7467
NSN 6135-00-913-2062
NSN 5960-00-391-6493
NSN 5965-01-058-1076
NSN 6620-01-537-4121
NSN 5999-00-274-3434
NSN 6620-01-062-2505