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 6610-01-399-1295
NSN 6685-00-155-4301
NSN 5910-01-216-1970
NSN 5920-00-425-2878
NSN 6105-01-056-9800
NSN 6240-00-941-2714
NSN 5975-01-171-7111
NSN 5975-00-830-4134
NSN 5985-01-510-9962
NSN 5975-00-661-1832
NSN 5930-00-216-7511
NSN 5915-01-571-3925