Silicon bronze fasteners are excellent for use in many marine and commercial applications which was made from copper with silicon added for strength.Silicon bronze is known as a high-strength alloy,having a several important factors including high conductivity,excellent corrosion resistant to sea water,gases,sewage and atmospheric conditions. Our silicon bronze fasteners(C65100,C65500 alloy)contain as follows: Silicon bronze wood screw Silicon bronze machine screw Silicon bronze hex cap screw Silicon bronze hex heavy nut Silicon bronze hex full nut Silicon bronze hex jam nut Silicon bronze machine screws nut Silicon bronze lag screw Silicon bronze carriage screw Silicon bronze flat washer Silicon bronze spring washer Silicon bronze threaded rods manufactured according to ANSI,DIN,BS as well as non-standard. All material were purchased from ISO certificated source. Packing:polybag,carton,pallet Some of items are in stock and can be shipped within 24 hours after receiving order