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 46 – Combination Socket Tee and Crossover Type 53 – Swivel Elbow 427 Three Socket Tee Type 15 – 90° Elbow