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 5930-01-541-4532
NSN 6105-01-341-7817
NSN 5835-00-562-7524
NSN 6645-00-899-1235
NSN 5999-00-664-1818
NSN 2925-00-824-2186
NSN 7035-01-012-2259
NSN 5930-01-046-1058
NSN 5965-00-752-5823
NSN 6650-00-425-7028
NSN 5975-00-103-2814
NSN 5975-01-547-3797