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 5985-00-633-9963
NSN 5975-00-814-3282
NSN 6240-01-437-4936
NSN 5905-01-152-4785
NSN 5985-00-491-6579
NSN 6105-01-391-7722
NSN 6135-01-231-4809
NSN 5996-01-375-1535
NSN 6320-01-255-2096
NSN 7035-01-528-3134
NSN 5998-00-167-1028
NSN 5975-00-501-8058