Secure pipe and fitting joints to complete your wood stove installation with these Imperial 8-18 x 1/2-in Black Stove Pipe Screws. They are constructed with black oxidized zinc for strength and durability and feature a hex head with washer to provide exceptional holding power. The screws have a self-drilling design that easily penetrates into material for smooth and easy installation. The screws can be installed with a power tool or by manual insertion with a pre-drilled 1/8-in pilot hole. Secure pipe and fitting joints to complete your wood stove installation with these Imperial 8-18 x 1/2-in Black Stove Pipe Screws. They are constructed with black oxidized zinc for strength and durability and feature a hex head with washer to provide exceptional holding power. The screws have a self-drilling design that easily penetrates into material for smooth and easy installation. The screws can be installed with a power tool or by manual insertion with a pre-drilled 1/8-in pilot hole.