Ace Glass 7646-02 5 mm I. D. Joint with O‑Ring Seal

Joint tooled with groove to take O-Ring and provide greaseless, vacuum-tight connection. Joints are held together with 7669 pinch type clamps. O-Rings are FETFE and may be used to 230°C. Each joint is furnished with an O-Ring so you get a spare O-Ring with every two joints purchased.