Adapter fittings are manufactured to be threaded directly into standardized NPT 3/8" mates. The Valved Flow path maintains a controlled disconnect of fluid and gas lines that are under pressure. Polysulfone is a lightweight, general-purpose material that is a sterilizable and medical-grade material. Viton O-Rings have excellent resistance to synthetic hydraulic fluids, fuels, aromatics, and many organic solvents and chemicals. 302 Stainless Steel is a material that is corrosion resistant and is considered a general-purpose spring. Size 6 fittings are designed to accommodate tubing that measures 3/8" or 9.53mm (ID).