Quality-Assured Sand Classifier Equipment Spiral Washer, Spiral Sand Washing Machine Spare Parts
Product description
Hexagon bolts are classified according to the hardness, tensile strength, yield strength, etc. of the screw wire, which is the grade of the hexagon bolt and what grade the hexagon bolt is. Different grades of hexagonal bolts are required for different product materials, and all hexagonal bolts have the following grades:
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