Jiaxing Yutong Technology Co., Ltd is famous Din931 Hex Bolt Manufacturers and China Din931 Hex Bolt suppliers. Our fasteners meet the international ISO standard, the German DIN standard, the American ANSI standard, the British BS standard, Chinese GB standard etc. Fastener grades are Grade4.8, 8.8 and 10.9. Grade A B C is available too. Cover almost the entire applicable fields of equipment manufacturing and machinery manufacturing and processing industries. In addition to customized Din 931 Hex Bolt, we also produce mainstream fasteners.