Pex brass fittings 3/4" stainless steel pex pinch clamp is manufactured of #304 annealed stainless steel, which is the most versatile and most widely used compared to any other. this pinch clamp conforms to the standard specification for stainless steel clamps used for securing pex tubing to metal insert fittings. it is intended as an alternative to the copper-alloy crimp rings. it is an ideal interlocking ring to use as it forms a complete 360? uniform watertight seal which is constantly maintained by th