Stainless Steel Slotted Hex Indented Head Sheet Metal Screw #12 x 1, Qty 250. Slotted Hex Indented Head Sheet Metal Screws. #12, Max 0.215 – Min 0.209. Underside of Head to Tip. Slotted Hex Washer Head. 5/16 Flats, Max 0.312- Min 0.305. Max 0.189 – Min 0.750 Including Washer. 5/16 Socket, Slotted Screw Driver. 100,000 – 125,000. 55,000 – 75,000. Sheet metal screws have sharp cutting threads that cut into sheet metal, plastic or wood. The shanks are threaded up to the head or to the undercut. These screws come in many types of heads, pan, flat, truss, oval, etc. Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood. To “go green” and reduce our use of plastic all product quantities will be packaged in as few packages as possible. Listing photo is generic for the fastener type listed in this listing and is not to scale. Please refer to the description for fastener details. We will respond with the requested information quickly. Powered by Solid Commerce The All-in-One Listing, Inventory & Order Management Solution.