. Machine screws are used in fastening nearly all types of hard materials. Especially useful in metal-to-metal or where heavy duty fastening is required.#4-40 x 1-1/2 in Slotted Round Machine Screw, Zinc Plated Steel, 48 PK Commonly used with flat or lockwashers.
Self-Drilling Screw, #12 x 1-1/2 in, Zinc Plated Steel Hex Head Hex Drive, 2000 PK Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds..