Screw Products YUKON #18 in. X 5 in. L Hex Black Steel Lag Screw 1 pk

The YUKON structural hex head lag screw is a strong lag screw with 5/16 in. hex head for a powerful torque transmission and easy installation. The built-in washer underneath the head provides great holding power and works well for heavy duty applications. Compatible with most above ground pressure treated lumber. For ground contact treated lumber, areas within one mile of saltwater, near swimming pools, exposure to corrosive chemicals, or other areas where corrosion is more likely to occur, use proper grade stainless steel.