Shanghai Changying Industrial Co., Ltd. is a professional sales all kinds of high strength stainless steel, and various special-shaped fastener enterprises. Products in accordance with the GB (GB), ISO (International Standard), DIN (German standard), ANSI (USA standard), BS (British Standard), JIS (Japanese standard) standard production. Can also be in accordance with the special requirements of customers supplied. The main products are: 12.9 grade high strength SCM435 alloy steel screw series, stainless steel series, the six hexagon head bolts, six screws, machine screws, six angle flange bolts, six horns, six horns, wood screw nut six corner flange nuts, nylon lock nut, self drilling screws, drywall screws, fiber board screw, stud, mushroom head square neck bolts, set screws, flat keys, a cylindrical pin, an elastic pin, Kong Zhou ring, split washer etc..