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 5835-00-339-3020
NSN 6685-00-932-5593
NSN 5985-00-252-5567
NSN 6645-01-375-5488
NSN 6685-01-447-5633
NSN 5990-01-212-2037
NSN 6105-01-091-4832
NSN 2925-01-226-6126
NSN 6645-00-764-0412
NSN 6645-01-381-0656
NSN 5920-00-501-7834
NSN 5998-01-302-5399