High quality precision screws Mechanical and physical properties : Gr.2 Gr.5 Gr.8 Raw Meterial : SAE1010 SAE1035 SAE5140 • Material: Carbon steel & stainless steel• Head style: various• Size: all size/AS you required• Surface Finish: Zinc plated (white blue yellow),black oxide , dacromet • Plating:BlackOxide,Zinc,Chrome,Galvanized,Nickle,Dacromet, Delta-Tone, Geomet,Ruspert• Packing: AS you ...