Prepare 1 bolt assembly by inserting lock washer (#D), then flat washer (#E) onto bolts (#C). Align chair seat (#2) to the holes of the chairback (#1). Secure center hole with bolts (#C), but do not fully tighten. Prepare 4 bolts assembly by inserting lock washer (#D), then flat washer (#E) onto bolts (#A). Secure corner holes with bolts (#A) and fully tighten all bolts.