You are buying six (6) NORS Auveco fasteners. They are door hinge screws for various models and years of Buick, Cadillac, Chevrolet, Oldsmobile and Pontiac vehicles. They are 5/16-18 (coarse thread) x 1-5/16" long phillips flat head, zinc plated, with a captured external tooth washer. The screws have a (Jackson) reduced head (1/2" diameter). 

You must compare your application to the photos and sizes that we have provided.