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top quality mining screw grader

Grade 8 Medium carbon alloy steel, quenched and tempered: 1/4 thru 1-1/2 120,000: 130,000: 150,000: Grade A325 Carbon or alloy steel with or without boron: 1/2 thru 1-1/2 85,000: 92,000: 120,000: Stainless Markings Vary: 18-8 & 316 Stainless Steel alloy with chromium and nickel ...

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