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 5998-00-272-5660
NSN 5945-01-266-9519
NSN 5975-00-617-9413
NSN 7035-01-287-7781
NSN 5895-01-382-9755
NSN 5999-00-909-8808
NSN 5855-01-279-9938
NSN 4140-01-521-8682
NSN 6145-01-386-3718
NSN 5998-00-187-8635
NSN 5935-00-028-4139
NSN 6240-01-497-3085