Forgefix multi purpose pozi screws csk st zyp forgefix mps320y these forgefix multi purpose pozi screws with countersunk heads have a zinc yellow passivated finish for increased durability these screws are immensely popular and versatile and used in all trades including joinery electrical and plumbing also widely used in diy applications forgefix mps320y multi purpose pozi screw csk st zyp 30 x 20mm box 200