Hillman Zinc-Plated Standard Hex Jam Nut 5/16 in. -18

Thinner version of a standard full hex nut. A jam nut is 2/3 the height of a regular hex nut

Perfect for general applications, and can be used as a primary nut along with a heavy or finished hex nut for a tight connection

Often used when a nut needs to be locked or "jammed" in place without clamping against another object

Also used to secure an item on a fastener without applying force to that object