An apparatus includes a predetermined size, shape, and thickness with a bolt hole adapted to receive a bolt therein and a method of attaching the apparatus to a ledger board sufficient to prevent rotation of the apparatus with respect to either the ledger board or the bolt hole. Modifications include securing the apparatus to the ledger board by the use of screws passing through a plurality of mounting holes provided in the apparatus or by the use of pointed protrusions that extend from the apparatus and which are pounded into the ledger board. Other modifications are described that include the use of intermediate shim spacers to vary the overall thickness of the spacer and of angled spacers for use with beveled types of siding.