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 5960-00-185-9974
NSN 5965-01-384-1953
NSN 5920-01-583-9736
NSN 4140-01-406-3292
NSN 5965-01-452-8406
NSN 6220-00-939-0040
NSN 5945-01-301-8383
NSN 5950-01-577-4950
NSN 5996-00-437-8121
NSN 6620-01-284-6526
NSN 6145-00-311-8884
NSN 6130-00-082-2633