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 6620-01-047-5831
NSN 5905-01-090-2043
NSN 5945-01-010-3279
NSN 6610-01-534-9765
NSN 5920-01-297-5895
NSN 5996-01-420-2745
NSN 6145-01-301-2003
NSN 6110-01-608-0899
NSN 6135-00-838-0706
NSN 5915-01-415-3100
NSN 6685-00-566-1995
NSN 5985-01-487-1135