Grip-Rite PrimeGuard Plus exterior screws feature a proprietary tan polymer coating engineered to meet ASTM B-117 salt spray corrosion standards. The #10 x 4" size is the longest in the line, providing maximum fastening depth for heavy structural connections, doubled-up lumber, and large timber framing. Sold in a 5 lb box for mid-size projects.

• T-25 Star Drive resists cam-out for reliable driving
• Bugle head with nibs for smooth countersinking into wood
• Type 17 self-drilling point eliminates the need for pre-drilling
• Coarse thread for superior holding power in wood
• Tan polymer coating meets ASTM B-117 salt spray standards
• Backed by a 10-year corrosion warranty

Applications: Heavy structural framing, doubled-up lumber, large timber connections, and demanding exterior construction.