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 5990-01-242-9653
NSN 6610-00-382-0266
NSN 5960-00-679-3944
NSN 5998-01-501-9120
NSN 5999-01-435-7168
NSN 6685-01-210-9996
NSN 6110-01-003-9614
NSN 6220-01-409-1585
NSN 5985-01-375-1301
NSN 5915-00-238-8942
NSN 5960-01-491-9916
NSN 5975-00-398-9716