Grip-Rite PrimeGuard Plus 5/16 In. x 4 In. Flat Washer Head Structure Screw (20-Count)

Flat Head Phillips drive design. Type 17 point course thread for easy, quicker penetration into wood without pre-drilling. Faster than lag screws in exterior structural wood applications. Approved for use in treated lumber. Protected by Grip-Rite's Primeguard Plus lifetime coating for improved corrosion resistance. Cobalt blue packaging features easy to read iconography, lateral load value references, and a scannable QR code that links directly to the ICC report for technical specifications.

• Flat Head Phillips drive design
• Type 17 point course thread for easy, quicker penetration into wood without pre-drilling
• Faster than lag screws in exterior structural wood applications
• Approved for use in treated lumber
• Protected by Grip-Rite's Primeguard Plus lifetime coating for improved corrosion resistance