ALEXANDRIA, Va., March 26 -- United States Patent no. 12,257,493, issued on March 25, was assigned to NHS Inc. (Santa Cruz, Calif.).
"Cast in shaft nut for skateboard truck" was invented by Timothy Charles Piumarta (Aptos, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A skateboard truck includes a metal bolt called a kingpin and a threaded fastener, called a hex nut, which when combined hold the two main components of a truck together: the baseplate, which is mounted to the bottom surface of the skateboard deck; and the turning part of the truck called the hanger, which is mounted onto the baseplate by means of the kingpin, and affixed tightly into the baseplate by means of a threaded shaft nut assem...