Reducer Conical KF-16 to KF-50 Vacuum Fittings, ISO-KF Flange Size NW-16 to NW-50, Stainless Steel, Sold as ONE EACH. These KF-16 to KF-50 conical reducer vacuum fittings follow ISO-KF standards and have a flange size of NW-16 to NW-50. 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 (please see top right figure - click to enlarge). 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. KF-16 to KF-50 Conical Reducer ISO-KF Flange Size: NW-16 to NW-50 Common Dimensions: A = .62 (16mm), B =1.57 (40mm)

Reducer Conical KF-40 to KF-50 Vacuum Fittings, ISO-KF Flange Size NW-40 to NW-50, Stainless Steel, Sold as ONE EACH. These KF-40 to KF-50 conical reducer vacuum fittings follow ISO-KF standards and have a flange size of NW-40 to NW-50. 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 (please see top right figure - click to enlarge). 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. KF-40 to KF-50 Reducer ISO-KF Flange Size: NW-40 to NW-50 Common Dimensions: A = 1.34 (34mm), B =1.57 (40mm)