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 6220-01-358-9975
NSN 5998-00-782-0414
NSN 5945-01-268-4492
NSN 6145-01-215-3869
NSN 6685-01-102-5259
NSN 5960-01-344-2604
NSN 6240-01-469-0074
NSN 5930-01-425-8521
NSN 5835-00-392-2630
NSN 5915-01-050-9080
NSN 5996-01-412-5548
NSN 5910-01-449-4942