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DIN933 DIN931 Heavy Hex Bolts Carbon Steel Grade4.8/ 8.8/ 10.9/ 12.9, Find Details and Price about Heavy Hex Bolts Hex Head Bolts from DIN933 DIN931 Heavy Hex Bolts Carbon Steel Grade4.8/ 8.8/ 10.9/ 12.9 - NINGBO JIANGBEI FANGCHEN INTERNATIONAL TRADING CO., LTD.