Design mil-dtl-01222 type iii style a or b
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 6645-01-294-2479
NSN 5915-00-854-3120
NSN 5895-01-598-9112
NSN 6145-00-019-0047
NSN 6610-01-597-7175
NSN 5895-01-615-4067
NSN 5999-01-370-2840
NSN 6610-01-369-9978
NSN 6130-00-455-8371
NSN 6645-00-126-0286
NSN 5855-01-568-7772
NSN 5910-01-358-1236