You are buying four (4) NORS Auveco fasteners. They are front & rear bumper bracket to frame bolts for 1963-1973 Buick. The bolts 1/2-13 x 1-1/8" long and are black & oil. The bolts have a 1.085" diameter head with a 1/2" square under the head that is 3/16" long. Replaces the GM part number 1378731. We do not have the nuts for these bolts.

Please note that these bolts may not be for some of the compatibility applications listed as we do not have all the body codes. You must compare your application to the photos and the sizes that we have provided.