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 6685-01-049-2046
NSN 6130-01-378-8462
NSN 2925-00-549-6759
NSN 6645-01-128-0895
NSN 4140-01-168-7404
NSN 6610-01-641-4191
NSN 5935-01-150-0690
NSN 7035-00-800-0770
NSN 4140-01-443-3523
NSN 5965-00-752-5823
NSN 5998-00-541-2529
NSN 5915-00-642-9997