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 5945-00-938-7899
NSN 5895-01-462-7626
NSN 6110-01-124-8799
NSN 6130-00-001-7093
NSN 5945-01-104-3931
NSN 5920-00-357-0260
NSN 5999-00-426-2858
NSN 6110-01-070-9602
NSN 6105-01-047-0220
NSN 5985-01-435-2589
NSN 6145-00-394-9120
NSN 6610-01-303-7658