S-99461A130 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in various environments
• Exceptional holding power in plastic materials due to the TRS thread forming design and Tri-Lobe shank that prevents loosening
• Efficient installation with No. 1 Phillips drive for secure torque transfer and reduced cam-out
• Full threading for maximum grip along the entire 1/2" length, providing uniform stress distribution
• Optimized for plastic applications with blunt tip and 20 threads per inch to minimize material cracking
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe use in industrial settings
• Standard pan head profile offers a low-profile finish and easy wrenching for streamlined assembly

Professional Applications & Engineering Value

These No. 4 x 1/2" tapping screws are specifically engineered for plastic fastening applications, addressing common issues like material stress and pull-out. The 18-8 stainless steel provides excellent resistance to rust and corrosion, ideal for outdoor or humid conditions. With a TRS thread forming design and Tri-Lobe shank, the screws create strong, permanent threads in plastic without pre-drilling in many cases, reducing assembly time and tooling costs. The Phillips pan head ensures a flush fit and easy drive engagement, while the fully threaded body distributes load evenly, preventing failure in dynamic loads. Commonly used in electronics enclosures, automotive trim, and consumer products, these screws deliver reliable performance in industrial fastening where durability and compliance are critical.

Specification Summary & Compliance

This product features a thread diameter of 0.112" with approximately 20 threads per inch, conforming to standard inch measurements for precision. The thread forming tapping method and right-hand threading ensure consistent engagement. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances. Manufactured to meet industrial specifications for tapping screws, it is designed for use with a No. 37 drill bit (0.104" diameter) in plastic materials, guaranteeing accurate fit and performance.