S-99512A616 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T8 Torx drive design that prevents cam-out and extends tool life
• Reliable corrosion resistance through zinc-plated steel construction for extended service life in various environments
• Optimal plastic material engagement with TRS thread forming design that creates strong, strip-resistant threads without chips
• Enhanced pull-out resistance thanks to the Tri-Lobe shank cross-section that provides superior holding power in plastic substrates
• Streamlined installation process with fully threaded design and blunt tip for precise positioning and consistent performance
• Comprehensive regulatory compliance meeting RoHS 3 and REACH standards for global industrial applications
• Versatile plastic fastening solution with pan head design that sits flush while providing adequate bearing surface

Professional Applications & Engineering Value

These No. 3 T8 Torx tapping screws are precision-engineered to address common challenges in plastic assembly applications. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for durable fastening. The innovative TRS thread forming design with Tri-Lobe shank cross-section eliminates the risk of plastic material cracking or stripping during installation, as it displaces material rather than removing it. This creates stronger, more reliable threads that resist vibration loosening and maintain integrity over time. The T8 Torx drive system ensures maximum torque transfer without slippage, reducing installation time and preventing damage to screw heads. Ideal for electronics enclosures, automotive plastic components, and consumer products, these thread forming screws deliver consistent performance while meeting strict industry compliance standards.

Specification Summary & Compliance

These tapping screws feature precise dimensional specifications including No. 3 screw size, 0.099" thread diameter, 24 TPI thread pitch, and 5/16" length. The thread forming (TRS) design follows industry standards for plastic fastening applications with right-hand threading and fully threaded configuration. Manufacturing compliance includes RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring these fasteners meet current environmental and safety regulations for industrial use. The pan head design with standard rounded profile provides consistent seating in plastic materials when used with the recommended No. 43 drill bit (0.089" diameter).