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HTZ101VP is a Reliable #10 x 1" TEK metal screw with a hex washer head, self-tapping thread and self-drilling point. Made of steel with a zinc-plated finish, it is designed for compatible metal fastening applications, including ventilation duct work. The screw features a 5/16" hex drive and full threading. This product is supplied in a 100-piece box. Verify the required screw size and application before installation.