S-90000A405 Length 2 1/4" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for humid or chemically aggressive environments in wood and composite applications.
• Enhanced torque transfer and reduced cam-out thanks to the square drive design, ensuring secure and efficient installation.
• Easier installation in dense materials with thread-cutting technology, which forms mating threads to minimize splitting and pre-drilling effort.
• Optimized grip and holding power from a 1-1/2" thread engagement length and 15 threads per inch, providing reliable fastening in wood and plastic-wood composites.
• Clean, low-profile finish with a standard flat head, allowing the screw to sit flush with the material surface for a professional appearance.
• Durable, long-lasting performance in demanding applications, backed by compliance with RoHS 3 and REACH environmental regulations.
• Simplified pilot hole preparation with a recommended 5/64" drill bit size, ensuring precise alignment and reducing installation time.

Professional Applications & Engineering Value

These 316 stainless steel wood screws are engineered to address common challenges in wood and plastic-wood composite fastening, such as material splitting, corrosion in outdoor or high-moisture settings, and installation inefficiency. The thread-cutting tapping method and pointed tip allow the screw to form its own thread path, reducing the need for extensive pre-drilling and minimizing stress on the substrate. This is particularly valuable in composite materials, which can be brittle. The square drive provides superior torque transmission compared to Phillips or slotted drives, reducing tool slippage and head stripping during high-torque applications. Combined with the partially threaded shank, these screws ensure that the unthreaded portion acts as a shear-resistant component, enhancing joint strength in structural wood assemblies, decking, furniture, and marine environments where corrosion resistance is critical.

Specification Summary & Compliance

This screw is a No. 8 size with a length of 2-1/4" and a thread diameter of 0.164". It features a flat head with a square drive (No. 2 size), partial threading, and a minimum thread length of 1-1/2". The threading is 15 threads per inch with a right-hand direction. Manufactured from 316 stainless steel, it is designed for use with a 5/64" drill bit (0.078" diameter) for pilot holes. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for regulated industrial and consumer applications.