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High Quality Hollo-Bolt Stainless Steel 304 316 Hex Countersunk Carbon Steel Structural Expansion Bolt Sleeve Anchor, Find Details and Price about M10 Hollo-Bolt Blind Structural Expansion Bolt from High Quality Hollo-Bolt Stainless Steel 304 316 Hex Countersunk Carbon Steel Structural Expansion Bolt Sleeve Anchor - Bester Industrial Technology Wuxi Co. Ltd