Wej-It Wej-Con Concrete Screw, 1022 Carbon Steel, Blue R-Blocker Finish, Hex Washer Head, Slotted Drive, Fits 1/4" Hole Size, 1-1/4" Length, 1/4" Threads (Pack of 100)
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<b>[Product Information]</b><br>
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<li>Concrete screw cuts threads into concrete, hollow block, brick, mortar, and concrete masonry units to provide a secure hold without requiring threaded inserts</li>
<li>1022 carbon steel screw has a corrosion-resistant blue R-Blocker coating that meets ASTM B117 specifications to resist 1,000 hours of salt spray</li>
<li>Hex washer head has a flange that provides additional bearing surface to distribute the force over the fixture being fastened and has a slotted drive for use with a flat-blade driver</li>
<li>Ultimate tensile strength is 670 lb. at 1" embedment depth and 1" edge distance in 2,730-psi concrete</li>
<li>Use one-fourth or less of listed maximum values for safe working loads (as required by local regulations)</li>
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