S-99461A958 Length 25 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in various environments
• Efficient thread-forming design (TRS type) creates strong, permanent threads in plastic materials without pre-tapping
• Optimized drive engagement with No. 1 Phillips drive for secure torque transmission and reduced cam-out risk
• Complete thread coverage with 1.57mm pitch provides maximum holding power across the entire 25mm length
• Versatile pan head design with 6.1mm diameter offers excellent bearing surface and clean finished appearance
• Precision manufacturing ensures consistent performance and reliable installation in plastic assemblies
• Environmental compliance with RoHS 3 and REACH regulations for safe use in regulated applications

Professional Applications & Engineering Value

These M3.5 TRS thread-forming screws are specifically engineered to address common challenges in plastic assembly applications. The 18-8 stainless steel construction provides exceptional corrosion resistance, making them ideal for applications exposed to moisture or harsh environments. The thread-forming design eliminates the need for pre-tapped holes, reducing assembly time and costs while creating strong, vibration-resistant connections in thermoplastic materials. The Phillips pan head configuration offers excellent drive engagement and a low-profile appearance, while the fully threaded 25mm length ensures maximum grip range. These screws are particularly valuable in plastic fastening applications across electronics enclosures, automotive components, and consumer products where reliable, permanent fastening is critical.

Specification Summary & Compliance

This metric tapping screw features M3.5 diameter with 25mm length and 1.57mm thread pitch, manufactured to precise dimensional standards. The TRS thread-forming design follows industry standards for plastic fastening applications, with blunt tip configuration and fully threaded shank. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use. Designed for use with No. 34 drill bit (0.111" diameter) in plastic materials, these screws deliver consistent performance and reliable installation in professional assembly operations.