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 5998-00-007-6013
NSN 5835-01-259-0859
NSN 5930-01-207-1012
NSN 5950-00-356-2688
NSN 5910-01-397-0741
NSN 5855-01-421-1440
NSN 5950-00-949-5736
NSN 6145-01-427-3520
NSN 5999-00-740-8259
NSN 4140-00-919-4425
NSN 6685-01-555-6681
NSN 5975-00-008-7834