Aluminum 6061

6061 is a precipitation hardening aluminium alloy, containing magnesium and silicon as its major alloying elements. Originally called “Alloy 61S,” it was developed in 1935.[1] It has good mechanical properties and exhibits good weldability. It is one of the most common alloys of aluminium for general purpose use.

Standard alloy for 1/4″ and larger nuts. Specially made bolts can be made from this alloy.