View Tameson''s range of ORFS fittings. These ORFS, O-Ring Face Seal, fittings are ideal for hydraulic and higher pressure applications. Having a seal on the face of the male threads ensures a tighter leak-free connection to a flat-bottomed female thread. Common accessories are plugs, end-caps, and o-rings. Different orientations are possible for ORFS fittings straight, elbow, tee, or cross.