Especially useful in metal-to-metal or where heavy duty fastening is required. Machine screws are used in fastening nearly all types of hard materials.#10-32 x 3/4 in Phillips Pan Machine Screw, Plain Stainless Steel, 100 PK Commonly used with flat or lockwashers..
.Sheet Metal Screw, #8 x 1/2 in, Black Oxide Steel Hex Head Slotted Drive, 25 PK Sheet metal screws make excellent fasteners for attaching metal hardware to wood because the fully threaded shank provides good retention in wood.