Thomas & Betts WA164 Steel City Reducing Washer. Steel City Reducing Washer, 2 x 1-1/4 in Size, For Use With: Rigid/IMC Conduits, Steel, Zinc Plated, 1-23/32 in ID x 3-1/4 in OD Dimensions. Additional Description: TB -WA164 2 - 1 1/4 REDUCING WASHER,RGD/IMC,S. Catalog Description: 2 Inch to 1-1/4 Inch, Reducing Washer, Steel-Zinc Plated, For Use with Rigid/IMC Conduit, CSA Listed.