Nanjing Newynn Fastener Co., Ltd. is mainly engaged in fastener manufacture, processing and sale, with eight categories of more than thousands of pieces of standard fasteners. Our products mainly include but are not limited to the National Standard (GB), Japanese Standard (JIS), German Standard (DIN), International Standard (ISO), American Standard (ANSI/SAE), British Standard (BSI) and other standard bolts, screws, nuts, washers, rivets, screws, steel connections, etc. Our materials mainly include high-strength alloy steel, carbon steel, low carbon steel, stainless steel, stainless iron and...