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Hex Socket Head Bolt
Norm : DIN912, ASTM A574
Grade : 8.8 10.9
Surface : Black, Zinc Plated
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Hex Flange Head Bolt
Norm: DIN6921，ANSI/ASME B18.2.1,ISO4162
Grade : 4.8 8.8 10.9 Gr.2/5/8
Surface : Plain, Black, Zinc Plated, HDG
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Flat Countersunk Head Square Neck Bolt
Norm : DIN608
Grade : 4.8 8.8
Surface : Plain, Black, Zinc Plated, HDG
