TIMco Set Screws DIN933 A2 Stainless Steel - M6 x 25 A fully threaded set screw used in a variety of applications. Manufactured from A2 Stainless Steel offering superior corrosion resistance, perfect for external applications. Stainless steel must be used where there is corrosive environment and/or the base material has inherent corrosive characteristics e.g. Green Oak. NOTE: Nuts not included.