1/2"-20 x 4-1/2" Hex Head Cap Screw Bolts, Stainless Steel 316 (Quantity: 25 pcs) Partially Threaded, Fine Thread, Thread Size: 1/2 Inch, Bolt Length: 4-1/2 Inch

Diameter - Thread Pitch: 1/2" - 20 / Length from Under Head: 4-1/2 Inch | Fine Thread / Partially Threaded | 316 Stainless Steel Hex Cap Screws are suitable for salt water, marine and hash environment installations | Commonly used for Boats, Docks, Piers and other Corrosive Environments | Called hex cap bolts or hex cap screws