Grade part code Aisi 304 best s4-1 Aisi 316 best s4-2 Best precision metal has talented engineers ready to help with your design needs. We have a modern cnc machine shop and best stainless is ground, buffed and polished by hand to a mirror finish to assist in making a quality part. In the passivation process after buffing, acid and rinsing remove surface contaminants from the products and produce a hydrous oxide film which enhances corrosion resistance. Every production shipment tested and certified
