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 6150-01-421-1770
NSN 2925-01-643-8395
NSN 5930-00-467-6808
NSN 5930-00-266-8175
NSN 6610-01-101-1927
NSN 6130-00-487-4384
NSN 6620-01-548-7441
NSN 6685-01-523-3394
NSN 5935-01-052-1239
NSN 5895-01-408-7887
NSN 6620-00-022-8056
NSN 6620-00-692-9668