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 6645-01-529-8822
NSN 5835-00-617-3578
NSN 6685-01-322-5688
NSN 5915-01-512-1327
NSN 6110-01-418-4998
NSN 5990-01-270-1015
NSN 6145-01-467-7435
NSN 6645-01-537-3114
NSN 5905-01-468-0284
NSN 7035-01-169-6551
NSN 5990-00-843-0244
NSN 6610-00-065-2696