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 5895-00-630-1868
NSN 5895-00-386-7061
NSN 5999-00-138-2982
NSN 6105-01-145-2681
NSN 6685-01-660-0850
NSN 5999-01-290-8058
NSN 6150-01-377-2620
NSN 5925-01-091-4577
NSN 6650-00-259-2605
NSN 5915-01-078-6480
NSN 5925-01-297-5906
NSN 6240-01-302-4561