S-90434A206 Length 8 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior Material & Corrosion Resistance: Zinc-plated steel construction provides excellent durability and protection against rust, extending service life in various industrial environments.
• Efficient Thread Forming for Plastics: The TRS (Thread Rolling Screw) design creates strong, clean threads in plastic materials without chipping or cracking, ensuring reliable, high-strength fastening.
• Optimized Drive & Installation: The Phillips No. 1 drive offers good torque transfer and cam-out resistance, while the standard flat head with a 90° countersink angle allows for a flush, professional finish.
• Full Thread Engagement & Holding Power: The fully threaded M3 x 8mm design maximizes grip and pull-out resistance along the entire shank length in plastic assemblies.
• Simplified Assembly Process: Designed for use with a standard 2.25mm drill bit, this screw streamlines the installation process, reducing preparation time and improving production efficiency.
• Regulatory Compliance & Global Acceptance: Meets RoHS 3 and REACH compliance standards, ensuring the product is free from hazardous substances and suitable for international markets and sensitive applications.
• Precision Right-Hand Threading: Features a consistent 1.34mm thread pitch and right-hand direction for predictable, secure fastening that aligns with common assembly practices.

Professional Applications & Engineering Value

This M3 TRS thread forming screw is engineered specifically for fastening into plastic materials, where traditional cutting screws can cause stress cracks or material failure. The zinc-plated steel offers a robust yet cost-effective solution, providing sufficient corrosion resistance for indoor applications or environments with moderate humidity. The thread forming action displaces material rather than cutting it, which results in stronger thread engagement and higher resistance to vibrational loosening—a common challenge in plastic assemblies for electronics, automotive trim, and consumer goods. The combination of a Phillips flat head and 90° countersink ensures a clean, flush mount that enhances product aesthetics and prevents snagging. By specifying a 2.25mm pilot hole, engineers can achieve optimal performance without the risk of boss cracking, making this screw a reliable choice for high-volume manufacturing and automated assembly lines.

Specification Summary & Compliance

This metric tapping screw conforms to standard dimensional and performance expectations for M3 x 8mm fully threaded fasteners. The TRS (Thread Rolling Screw) type is designed for thread forming applications in plastics, ensuring secure fastening without the need for pre-tapped holes. The product is manufactured to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it adheres to strict environmental and safety regulations for hazardous substances. The screw features a blunt tip and round shank cross-section for consistent performance.