snippet: <b>One-Piece Threaded Clamping Collar Recessed Screw TC-Series, Climax Metal, " bore, 9/11" outside diameter. </b><br><br>Stainless Steel One-Piece Threaded Clamping Collars - Recessed Screw Head. Recessed screw head provides an outside surface free of major projections for safety. Design fully engages the thread for secure locking.<br><br> (Page 1)