... accorded with BS, DIN, ANSI standard. Product Description:Drywall screwThe screws we can provide include: Blued galv. ... head, checkered Philips head drywall screws with fine thread, coarse thread drywall screws, coarse thread drywall screws (black phosphated), ... color galv., screws with self-drilling point, color galv., screws, e.g. pan head screws, prime guard ...