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 6650-00-597-7313
NSN 5920-01-373-9405
NSN 6620-01-006-4899
NSN 5920-01-104-4332
NSN 5990-00-552-1611
NSN 5960-01-197-4461
NSN 6130-01-497-5713
NSN 6145-00-186-6291
NSN 6685-00-915-9394
NSN 6110-00-688-7688
NSN 5855-00-791-5000
NSN 6320-01-352-8084