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 6620-00-877-3266
NSN 6240-01-262-5787
NSN 5996-01-477-4143
NSN 5910-01-383-7094
NSN 5975-00-665-3644
NSN 2925-01-323-4235
NSN 2925-00-182-8656
NSN 6105-01-513-8653
NSN 6150-00-913-3370
NSN 5950-01-026-8620
NSN 6105-01-424-0275
NSN 5950-01-643-8790