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 5855-01-634-0259
NSN 6645-01-034-6037
NSN 5910-01-451-4905
NSN 4140-00-880-0759
NSN 6620-00-531-2974
NSN 6240-00-470-7625
NSN 5925-01-156-8708
NSN 4140-01-398-2900
NSN 6145-01-588-7708
NSN 5996-00-905-6610
NSN 6145-01-335-1991
NSN 5925-01-566-7676