These bulkhead feedthroughs have a KF-25 fitting. They are used to quickly add an ISO-KF NW 25 port to any flat plate. This bulkhead fitting requires a 1" hole through and can be used on bulkheads up to 1" thick.

The ISO-KF flanges 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 Stainless Steel.

KF-25 Bulkhead Feedthrough Adapter Data:

• Flange Size: ISO-KF NW-25, KF-25
• Body Material: 304L Stainless Steel
• Seal: Viton O-Ring
• Ultimate Vacuum: 10^-8 Torr (High Vacuum)
• Hole Size: 1 in. I.D.
• Maximum Plate Thickness: 1 in. thick
• Common Dimensions: A = 0.75", B = 1.62", C = 1.23"