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 5975-01-596-3799
NSN 5965-00-281-0319
NSN 5915-01-446-7238
NSN 6620-00-736-8457
NSN 5990-01-174-6851
NSN 6620-01-208-5915
NSN 6145-01-214-5374
NSN 6620-01-371-5040
NSN 6610-01-632-8561
NSN 6685-01-425-1719
NSN 6135-01-560-8130
NSN 6135-00-269-5843