7 x 1-5/8 Square Drive Self-Drill Wood, 316 SS, Trim Head

7 x 1-5/8 in. Self-Drilling Wood Screws, 316 Stainless Steel, Trim Head, Square Drive

Designed for demanding exterior woodworking and construction applications, these 7 x 1-5/8 in. self-drilling wood screws are manufactured from passivated 316 stainless steel for excellent corrosion resistance in harsh environments. Their premium stainless steel construction makes them especially well suited for projects exposed to moisture, humidity, salt spray, pool chemicals, and other corrosive conditions. Choose from convenient 1-lb., 5-lb., or bulk 4,000-piece quantities to match the needs of your project.

7 x 1-5/8 in. 316 Stainless Steel Self-Drilling Wood Screws

The trim head provides a smaller, more discreet profile than a standard wood screw head, making these screws a practical choice for decking, exterior trim, and other finished wood surfaces where appearance matters. The square drive offers positive driver engagement for controlled installation, while the Type-17 self-drilling point helps the screw start efficiently in wood.

Coarse threads extend along approximately two-thirds of the shank to provide strong holding power and help draw decking, boards, and other materials tightly against the framing. The passivated 316 stainless steel construction provides enhanced resistance to corrosion compared with standard stainless steel, making these screws an excellent choice for coastal, poolside, marine, and other challenging outdoor applications.

Features

• 316 stainless steel construction: Provides excellent corrosion resistance for demanding exterior, coastal, poolside, and marine applications.
• Passivated finish: Enhances the corrosion resistance of the stainless steel for long-lasting outdoor performance.
• Trim head: Features a smaller, less noticeable head profile for a cleaner appearance on decking and finished wood surfaces.
• Square drive: Provides secure driver engagement to help maintain control during installation.
• Type-17 self-drilling point: Helps the screw start efficiently in wood without requiring a separate starter hole in many applications.
• Coarse threads: Extend along approximately two-thirds of the shank to help pull materials tightly against the framing.
• 7 x 1-5/8 in. size: A versatile length for a variety of exterior woodworking and fastening applications.
• Multiple quantity options: Available in 1-lb., 5-lb., and 4,000-piece bulk quantities for individual projects or larger installations.

Ideal Applications

These 316 stainless steel wood screws are designed for applications where corrosion resistance and a discreet finished appearance are important. They are well suited for exterior woodworking, decking, outdoor trim, coastal construction, poolside projects, marine environments, and other installations exposed to moisture or corrosive conditions.

Installation Information

Although 316 stainless steel offers excellent corrosion resistance, stainless steel screws are generally more susceptible to breakage than hardened steel screws. Use care during installation and avoid excessive driving torque. The trim head has a non-standard head diameter of approximately 0.230 in., so take care when driving the screw to help prevent damage to the head or surrounding material.

Predrilling is recommended near board ends to help reduce the risk of splitting.

For exterior woodworking projects that demand dependable corrosion resistance without a large, noticeable screw head, these 7 x 1-5/8 in. 316 stainless steel self-drilling wood screws deliver a combination of durability, discreet appearance, secure square-drive installation, and reliable holding power.