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12.9 grade carbon steel hexagonal bolts GB/T 5783-2016 Full thread hexagonal head bolts
Dimensions: M8-M16
Standard Designation: GB/T 5783-2016
Material Grade: Carbon Steel
Head Style: External hexagon
GB/T 5783-2016
Grade 12.9 hexagonal screws are the most commonly used series in the high-strength bolt series. Grade 12.9 hexagonal screws are generally used in places with high mechanical performance requirements, such as injection molding machinery, hydraulic equipment, mold assembly, etc. The surface hardness of grade 12.9 hexagonal screws after heat treatment can reach 39-44 degrees.
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