Overview Reviews Product Description Thomas and Betts TK127A Set Screw Coupling 2-1/2 TK127A-N-YAG. Product Videos Custom Field Size 2-1/2 Material Steel Product Reviews Write a Review Write a Review × Thomas and Betts TK127A Set Screw Coupling 2-1/2 Inch Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *