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 5990-00-933-5314
NSN 5925-01-612-6151
NSN 6145-01-104-5076
NSN 6145-01-355-7192
NSN 4140-01-451-4955
NSN 5930-01-361-5381
NSN 5990-01-233-6699
NSN 6650-01-433-3056
NSN 6620-01-158-7309
NSN 6130-01-385-1009
NSN 5895-01-220-1647
NSN 6610-01-335-3185