API oval gaskets with Znic plated applied in valve fitting Size:inch ... --PN42.0Mpa API 6A ring Joint Gasket (RTJ) gasket shapeoctagonal, oval ,lens, serratedstandardsAPI 6A,HG20633-97,HG20612-97materialsoft iron,carbon steel ... materialmax hardness(HB)max temperature(degrees)soft iron90450carbon steel120450F51150540304160600316160600 API Oval Gaskets With Zinc Plated