Replace lag screws with the Grip Rite PrimeGuard Plus Hex Washer Head Structural Screw. This 5/16" x 5" screw features a dual-drive hex washer head that accepts both a 3/8" hex driver and a T-25 star bit, giving you flexibility on the jobsite. The Type 17 self-drilling point cuts into wood without pre-drilling, speeding up installation.

• PrimeGuard Plus coating resists corrosion and rust
• Approved for use in ACQ pressure-treated lumber
• Replaces lag screws in load-bearing structural applications
• ICC-ES evaluated (ESR-3933) for code-compliant connections
• Dual drive: 3/8" hex washer head with T-25 star recess
• Type 17 point eliminates need for pre-drilling
• Free driver bit included
• 25 screws per box

Applications: Decks, pergolas, gazebos, trusses, playground structures, and general exterior wood-to-wood structural connections.