KF-25 High Vacuum Flange X FNPT
KF-25Â or NW25Â Vacuum fittings are designed for Ultra-High-Vacuum applications and are made out of 304 stainless steel. These fittings require a special gasket with metal centering ring to not allow over compression of the gasket. These fittings have female NPT threads that come in a variety of sizes from 1/8", 1/4", 3/8", and 1/2" Female NPT threading which require thread sealant if they are installed to another NPT adapted fitting.
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