DIN 7504-O flat head self-tapping screw with phillips, ST4.2 x 13, phillips, Article number 7504OA242013. Made in stainless steel a2-20h. Flat Head Self-Tapping Screw with Phillips manufactured to DIN 7504-O 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.