S-90031A450 Length 4" Wood Screws

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust, extending screw lifespan in various woodworking environments.
• Superior Holding Power: Thread forming tapping method creates tight, secure threads in wood, reducing the risk of pull-out and ensuring long-term fastening integrity.
• Flush, Professional Finish: Flat head with 82° countersink angle allows the screw to sit neatly below the wood surface, minimizing snagging and improving aesthetics.
• Optimized for Wood Types: Partially threaded design with specific drill bit recommendations (3/16" for hardwood, 9/64" for softwood) ensures easy installation and maximum grip in different materials.
• Efficient Drive Engagement: Phillips No. 4 drive style offers good torque transfer and reduces cam-out, speeding up assembly in high-volume projects.
• Right-Hand Threading for Standard Use: 8 threads per inch and pointed tip facilitate quick, straightforward insertion in common wood fastening applications.
• Compliance with Safety Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in industrial and commercial settings without hazardous substances.

Professional Applications & Engineering Value

These No. 18 wood screws are engineered to address common challenges in wood fastening, such as material splitting and weak grip. The zinc-plated steel material offers durability against environmental factors, while the thread forming technology ensures strong, permanent threads without pre-tapping, reducing labor time. The partially threaded shank and flat head design with an 82° countersink angle provide controlled penetration and a clean finish, ideal for furniture assembly, cabinetry, and structural woodworking. By specifying drill sizes for hardwood and softwood, these screws minimize installation errors and enhance load distribution, making them a reliable choice for contractors and manufacturers seeking efficiency and performance in wood joinery.

Specification Summary & Compliance

This product features a thread diameter of 0.294" with approximately 8 threads per inch and a minimum thread length of 2.667", adhering to standard inch measurements for precise fit. The flat head profile and Phillips drive are designed for consistent performance in wood applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances and supporting safe industrial use.