FLANGES Machined Flanges for use with O-Ring Gaskets 303, 304, or 305 Stainless Steel For use with Clampco Retainer Series 42, 54, 61, and 81 303, 304, or 305 Stainless Steel For use with Clampco Retainer Series 41, 62, and 83 ENGLISH (inches) 303, 304, or 305 Stainless Steel For use with Clampco Retainer Series 52 and 82 303, 304, or 305 Stainless Steel For use with Clampco Retainer Series 43 and 63 ENGLISH (inches) NOTE: O-ring sealed flanges are for low temperature and structural applications. O-ring groove dimensions to be specified by customer. 303, 304, or 305 Stainless Steel For use with Clampco Retainer Series 51 and 71 Custom Order Clampco can work with your custom requirements for a leakproof connection. Our team will help you design a clamp that can withstand corrosive environments, severe vibration, high temperatures, and pressure changes. Contact Clampco for a reliable solution.