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 5835-01-536-5739
NSN 5895-01-577-0012
NSN 5960-01-460-0115
NSN 5998-01-116-4344
NSN 6145-01-100-0732
NSN 6685-01-538-6710
NSN 6150-01-453-6718
NSN 6130-00-249-2905
NSN 5999-01-277-3562
NSN 5855-00-832-9341
NSN 5996-01-100-4361
NSN 5935-00-752-3109