S-99397A264 Length 8 mm Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx Plus IP6/T6 drive, reducing tool slippage and assembly errors in repetitive industrial applications.
• Reliable thread forming in plastics using the TRS tri-lobe shank design, which displaces material to create strong, vibration-resistant threads without pre-tapping.
• Enhanced corrosion resistance from the zinc-plated steel construction, ensuring long-term durability in various environmental conditions.
• Optimized for plastic assemblies with a blunt tip and 0.79mm pitch, minimizing stress cracking and providing secure fastening in brittle materials.
• Streamlined installation process with a standard pan head and fully threaded design, allowing for quick, flush seating and consistent clamping force.
• Compliance with global standards including RoHS 3 and REACH, guaranteeing safe, environmentally responsible components for regulated industries.

Professional Applications & Engineering Value

These M1.91 x 8mm zinc-plated steel Torx Plus TRS tapping screws are engineered specifically for plastic applications, where traditional fasteners often cause material failure. The tri-lobe shank cross-section and thread forming action compress plastic fibers during installation, creating high-strength, strip-resistant threads that withstand dynamic loads and thermal cycling. This design eliminates the need for threaded inserts or adhesives, reducing assembly time and component costs in electronics enclosures, automotive trim, and consumer goods. The Torx Plus drive system ensures maximum torque transfer, preventing cam-out and tool damage during high-volume production, while the zinc plating provides a protective barrier against oxidation in humid environments.

Specification Summary & Compliance

This metric tapping screw features a M1.91 diameter with 0.79mm approximate pitch and 8mm length, manufactured to precise dimensional standards for consistent performance. The TRS (Thread Rolling Screw) type with fully threaded design and right-hand direction ensures uniform engagement in pre-drilled holes (recommended drill bit: No. 51 / 0.067"). Compliance is verified with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances for industrial and international supply chain requirements.