S-91555A109 Length 1 1/4" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black phosphate steel coating for extended service life in various environments
• Enhanced holding power through thread forming technology that creates stronger, more permanent connections in wood materials
• Optimized material engagement with partial threading design that reduces splitting while maintaining maximum grip strength
• Secure installation control with Phillips No. 2 drive that prevents cam-out and ensures proper seating
• Reduced material stress thanks to the rounded pan head design that distributes pressure evenly
• Precision compatibility with 5/64" drill bit for clean, accurate installations in fiberboard and particleboard
• Reliable fastening performance with right-hand threading and pointed tip for easy starting and smooth driving

Professional Applications & Engineering Value

These No. 8 wood screws are specifically engineered to address common challenges in fiberboard and particleboard applications, where traditional fasteners often cause material splitting or insufficient holding power. The black phosphate steel construction provides essential corrosion protection for interior applications where moisture or humidity may be present. The thread forming technology is particularly valuable for engineered wood products, as it displaces material rather than removing it, creating stronger thread engagement that resists pull-out forces. The partially threaded design allows the unthreaded shank to act as a precision pilot, reducing stress concentration points that lead to material failure. With a 0.164" thread diameter and 9 threads per inch, these screws deliver optimal balance between installation speed and holding strength, making them ideal for cabinetry, furniture assembly, and construction applications where reliable fastening performance is critical.

Specification Summary & Compliance

These wood screws feature precision inch system measurements with a No. 8 screw size and 1-1/4" length. The threading conforms to standard right-hand thread direction with approximately 9 threads per inch and a minimum thread length of 0.825". The pan head design with standard rounded profile and Phillips No. 2 drive ensures compatibility with common installation tools. Manufactured to meet industry standards for thread forming screws, these fasteners are suitable for professional woodworking and construction applications where consistent performance and reliable material engagement are required.