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 6620-01-301-3258
NSN 6150-00-165-9979
NSN 2925-01-538-1343
NSN 6110-01-130-8038
NSN 5915-01-392-2137
NSN 5975-00-087-6640
NSN 6150-01-400-4211
NSN 5935-01-634-0668
NSN 6240-01-535-6520
NSN 5835-01-281-1655
NSN 5996-00-905-6610
NSN 6645-00-896-9430