KF40(NW40) Blank Flange Vacuum Fitting - Stainless Steel Cap - StopperThese Blank Flange fittings follow ISO-KF standards. They are commonly used to build foreline vacuum plumbing and process systems. They are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges. The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10. KF-16. KF-25. KF-40. and KF-50 with flange sizes NW-10. NW-16. NW-25. NW-40. and NW-50. respectively. They are made of corrosive resistant stainless steel. get it fast!
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