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 6145-01-109-9874
NSN 5999-01-644-5791
NSN 5998-01-338-0145
NSN 5930-01-646-3678
NSN 5996-00-147-4120
NSN 4140-01-167-7574
NSN 5920-00-081-9156
NSN 4140-01-378-2651
NSN 6650-00-018-7298
NSN 5960-00-916-3859
NSN 6645-01-128-0895
NSN 5905-00-363-3590