All of our gaskets are made from high-purity, electronic grade oxygen-free copper alloy 101 (99.99% pure), 1/4-hard temper, Rockwell 63-83 hardness, ASTM F 68-77, ASTM B 152-79.
Gaskets are punched dry, but the dyes are wiped with a vanishing cutting fluid which comes in contact with the gasket. It evaporates, leaving no residue. Nicks or scratches shall not exceed .0005" deep, or .003" wide. Burrs shall not exceed .002".
We also offer silver-plated copper gaskets designed to prevent oxidation at high temperatures.
* Asterisk items have a larger ID for special requirements.