It is a tube formcomposed of a medium weave cotton reinforcement combined with a phenolic resin system, enhanced with a self-lubricating graphite powder modifier. The mechanical properties are similar to NEMA C. RT315 is designed for a variety of applications, including cams, gaskets, flanges, rings, collars, sleeves, pillow blocks, brake lining, timing wheels, light duty gears, journal and other bearing applications, and thrust washers. It is not recommended for electrical applications.