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 6220-01-118-8096
NSN 6145-01-152-9013
NSN 6620-01-421-3917
NSN 6610-00-886-9140
NSN 5935-01-464-2647
NSN 6220-01-211-8419
NSN 6130-01-021-4980
NSN 6150-00-775-7274
NSN 5990-00-734-7285
NSN 5910-01-176-2619
NSN 5960-01-217-8928
NSN 6650-00-069-9370