ISO 14585-C rounded head sheet metal screw with torx (form C), ST3.9 x 9.5, Article number 14585CA239009. Made in stainless steel a2-20h. Rounded Head Sheet Metal Screw with Torx manufactured to ISO 14585 with ISO 1478 tapping screw thread (ST) thread, coarse pitch, fully threaded. Standard parts to the same standard, property class, dimensions and surface finish are interchangeable between manufacturers; confirm the controlling standard revision, any class-society or application approval, and the mating thread before substitution.