We offer this Stainless Steel bolt for the Specific purpose of mounting your Caliper Bracket to your trailers Brake Flange on the standard 5 Hole flange on 5,200lb-6,000lb trailer axles. You would need (5) of these bolts per flange. This bolt accommodates Kodiaks 5,200lb-6,000lb Caliper Mounting Brackets.This listing is for (1) Bolt and also includes (2) Stainless Steel Washers, (1) Stainless Steel Lock Washer, and (1) Stainless Steel Hex Nut