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 6150-01-373-5063
NSN 6130-01-417-2885
NSN 6110-00-450-4366
NSN 5998-01-123-9687
NSN 6620-01-485-0556
NSN 5965-01-063-7894
NSN 4140-01-134-8940
NSN 4140-01-062-7244
NSN 5930-01-333-8777
NSN 6220-01-512-7044
NSN 6620-01-025-4690
NSN 5855-00-079-2370