GRIP RITE HEX HEAD STRUCTURAL SCREW - 5/16" x 4"(50 pack)
Replace lag screws with the Grip Rite PrimeGuard Plus Hex Washer Head Structural Screw. This 5/16" x 4" 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
- 50 screws per box
Applications: Decks, pergolas, gazebos, trusses, playground structures, and general exterior wood-to-wood structural connections.