Type 21 – 90° Side Outlet Tee admin | August 9, 2020 Most frequently paired with Type 20 to give a 90° corner joint for the middle rail of safety railing and other rectangular structures. The upright passes through the fitting. Add to quote Categories: All Products, Fitting, Klamp, Tee Fitting Description Description Related products Type 12 – 45° Single Socket Tee Type 93 – PGR Tee Type A10 – Split Single Socket Tee Type 86 – Angle Tee