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The broken piece is also stripped, and ground slightly all around its edge so it fits the hole without hanging up around its circumference. It's vital for a good repair that the pieces sit perfectly flush. The broken piece was slipped back into place and clamped to the backing plate with a long 7/16-inch bolt (440 headbolt) with a nut and washer. Since the backing plate floats, the long bolt allows a handle for getting perfect alignment of the broken piece while tack welding.