... Inch and Metric spec are available4. Material of DIN912 socket cap screw :Carbon steel, Alloy steel, stainless steel or according ... . Lengh:as requires6. Diameter :as requires7. Surface of DIN912 socket cap screw :Plain, black finished, Zinc plated (Galv), Nickel, phosphate ... black, 3Cr zinc,Passivation8. Packing of DIN912 socket cap screw :General packing: 15-20Kg per Carbon or Bag, approx ...