Do it #10 x 3-1/2 In. Coarse Thread Black Phosphate Drywall Screw (5 Lb.-Box) Yukon Shield It effectively seals around a

It effectively seals around a variety of roof fixtures without the messy look of asphalt

thick doors

For indoor or outdoor use

the most versatile

Order covers separately

Do it #10 x 3-1/2 In. Coarse Thread Black Phosphate Drywall Screw (5 Lb.-Box) Yukon Shield It effectively seals around aCan be used for drywall, hardware, plywood, composition, and softwood. Sharp point, coarse thread with a No. 2 Phillips recess, bugle head. Phosphate finish. For interior use. This screw is constructed of hardened steel which is the result of carbon steel being put through heat treatment, quenching, and further reheating making it extremely durable. Hardened Steel is more resistant to wear, corrosion, and abrasion.