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 5996-01-116-1988
NSN 5975-01-628-6889
NSN 5998-00-633-5169
NSN 6620-00-834-9430
NSN 6110-01-477-2111
NSN 5835-01-342-7975
NSN 5945-00-104-5922
NSN 5945-00-864-8847
NSN 6685-01-555-7938
NSN 5855-00-129-6055
NSN 6645-00-972-5239
NSN 6610-01-123-7292