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 5950-01-249-4821
NSN 6150-00-288-6245
NSN 6240-00-201-9011
NSN 5985-00-128-6215
NSN 5895-01-386-3049
NSN 5915-01-268-2604
NSN 6650-00-590-9073
NSN 5915-01-241-7647
NSN 2925-01-143-0092
NSN 6135-01-398-5922
NSN 6110-01-375-5568
NSN 5975-00-293-8166