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.#8-32 x 1 in Slotted Oval Machine Screw, Plain Nylon, 15 PK Commonly used with flat or lockwashers..
Sheet Metal Screw, #8 x 1-1/4 in, 18-8 Stainless Steel Truss Head Phillips Drive, 18 PK They provide secure metal-to-metal and metal-to-wood fastending.