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 5985-01-289-1198
NSN 5950-01-433-9143
NSN 6150-01-399-5799
NSN 5965-00-335-0305
NSN 5950-01-551-1049
NSN 6685-01-367-7346
NSN 6150-01-298-8901
NSN 6685-01-056-4861
NSN 6110-01-399-8109
NSN 6130-01-367-2528
NSN 5998-01-054-4998
NSN 6620-01-476-7355