15-25 kV. 600 Amp, Bolt Washers Prepack, (1) Zinc Plated Steel Compression Washer Diameter 1.313 inch with .640/.653 Diameter Hole, (1) Tin Plated Steel Flat Washer 1-1/4 inch Diameter with .656 inch Hole, (1) 304 Stainless Steel Hex Head Cap Screw Machined 5/8-11 UNC-2A Overall Length 1.9 inch. (1)