... factory and OEM 2.can be heat treatment by ourself. 3.can be finished various of surface as per customer's ... : Carbon Steel, Stainless steel, Aluminium, Brass 2. Size: M3 ~ M16 3. Head: Flat, Pan, Double Flat...etc4. Length: 16 ~ 400mm.5. Finish ... : DIN, GB, ISO, ANSI, ASME, JIB etc.7. Pozi #2/#3/#4 Drive