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 5945-01-142-2182
NSN 5960-00-455-9218
NSN 6685-01-346-7677
NSN 5965-01-033-9352
NSN 5925-01-138-4930
NSN 5975-01-085-6979
NSN 5855-01-259-0995
NSN 6685-00-153-3914
NSN 6650-01-371-0500
NSN 5925-01-215-1386
NSN 6110-01-352-1922
NSN 5895-01-186-0305