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 6620-01-200-6493
NSN 6150-01-169-9571
NSN 5935-01-218-8021
NSN 5835-00-113-6090
NSN 6320-00-456-2092
NSN 6135-01-514-0356
NSN 5910-01-620-9478
NSN 6135-00-050-7189
NSN 6150-01-016-3187
NSN 6240-01-335-7727
NSN 5855-00-482-9876
NSN 5990-01-011-8022