Bolts、Screws、Nuts、Washers、Rivets and hose clamps Standards GB national standard, JIS Japanese standard, DIN German standard, ANSI/ASME American standard, BS British standard, ISO international standard. Development and processing for Non-standard According to drawings, samples to proceed Material Stainless steel、Carbon steel、Alloy steel、Titanium alloy, Aluminum alloy, Copper, Plastic and other industrial materials.