Product Description: M30 x 3.5 x 160 Bolts for Mine Ball Mills Material Grade: 40Cr; Quality Level: 12.9, 10.9, 8.8, 6.8, 4.8 Grade Sizes:M48; Specification: M48 x 180, M48 x 210, M48 x 330, M48 x 370, M48 x 390,M48 x 600...learn more
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