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 5945-01-332-9194
NSN 7035-00-631-3782
NSN 6240-01-149-4861
NSN 5855-01-165-6361
NSN 5855-01-020-7982
NSN 5985-00-393-9820
NSN 5998-00-099-2724
NSN 5835-01-575-5053
NSN 5910-01-434-1657
NSN 6150-01-602-8618
NSN 6145-01-517-3714
NSN 6685-01-565-1759