Thomas & Betts WA163 Brand: Thomas & Betts. Part Number: WA163. Additional Description: TB -WA163 2IN-1INREDUCING WASHER,RGD/IMC,STL. Catalog Description: 2 Inch to 1 Inch, Reducing Washer, Steel-Zinc Plated, For Use with Rigid/IMC Conduit, CSA Listed..