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HEX Head 1/4 x 2-3/4", 3-3/4" & 4" Concrete Masonry Screw / Anchor, Blue ceramic coating, Tapcon. Picture shown above is example and each length have different amount of threads are on the shaft thread are decreases as length increases.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.