Hunan Gurth Technology Co., Ltd., is a professional manufacturer of fasteners with 2 factories in Wenzhou and Hunan province, is one of the main class 8.8 and 12.9 bolts manufactures in the word, has devoted itself to provide the high quality mechanical fitting screw. With near hundred sets of to advanced fastener production equipment, We Specialized in development, production and sell screws pre DIN, ANSI, ISO AND GB standards. We had engaged in hardware and fasteners industries for more than 20 years. We focus on fasteners, our main products: Socket head cap screw DIN912 8.8, 10.9, 12.9; Hex bolts DIN933, 931 8.8, 10.9, 12.9; Nut; Set screw; Rod screw. ...