Also referred to as thin nuts, Super Duplex Finished Hex Jam Nuts are approximately 65% as thick as standard hex nuts.
These Hex Jam Nuts are often used when a nut needs to be locked in place without clamping against another object. This nut mostly goes about as the "other object", as the two nuts are fixed against one another. Super Duplex Finished Hex Jam Nuts are also used for leveling.