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Amazon.com: ITW Brands 24292 15 Pack, 5/16" x 2", Steel, Hex Washer Head, Large Diameter Tapcon Concrete Anchor , blue : Industrial & Scientific
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Tapcon 3/16 In. x 2-3/4 In. Star Head Concrete Screw Anchor (75 Ct.) - Town Hardware & General Store
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Source 1/4 3/16 inch steel slotted hex washer head blue masonry tapcon concrete screw on m.alibaba.com
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