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Lag Bolts are really just over-sized screws – way over-sized! That makes them perfect for tasks that are even too big for a #12 screw, especially exterior jobs. Unfortunately, lag bolts up to the task that could handle challenging environments have been almost impossible to find. Now you don’t need to redesign your project to get around the lag bolt problem. These tough lag bolts are plenty strong (up to 30% more torque capacity than standard steel lag bolts), with all the corrosion resistance of 18-8 stainless steel. Quantity discounts are per size. Made in Taiwan. All 5/16 lag screws have a 1/2" hex head. See table below for thread lengths by overall length.