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 6645-00-079-1430
NSN 6620-00-189-0967
NSN 5960-01-056-4982
NSN 2925-01-271-6234
NSN 6645-01-333-2035
NSN 6110-00-758-2051
NSN 5975-01-303-8374
NSN 5855-01-629-7894
NSN 6105-00-153-6350
NSN 2925-01-244-3016
NSN 6150-00-825-3770
NSN 6685-01-065-0530