S-99512A648 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T27 Torx drive prevents cam-out and ensures secure fastening in plastic assemblies
• Exceptional corrosion resistance through zinc-plated steel construction extends service life in various environments
• Reliable thread-forming capability with TRS design creates strong, permanent threads in plastic materials without pre-tapping
• Enhanced holding power from Tri-Lobe shank design provides superior resistance to vibration and pull-out forces
• Optimized plastic fastening with blunt tip and specific thread pitch prevents material cracking and stress damage
• Full environmental compliance meeting RoHS 3 and REACH standards ensures safe use in regulated applications
• Precision installation with No. 7 drill bit compatibility ensures proper fit and maximum fastener performance

Professional Applications & Engineering Value

These No. 12 thread-forming screws are specifically engineered for challenging plastic fastening applications where material integrity is critical. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for durable assemblies. The Tri-Lobe shank design and thread-forming TRS profile work synergistically to displace plastic material without creating excessive stress concentrations, effectively preventing the cracking and splitting commonly associated with standard fasteners in plastic components. The T27 Torx drive system delivers maximum torque transfer efficiency, reducing installation time and eliminating the stripped drive heads that plague traditional fastening methods. These features make these tapping screws ideal for automotive plastic components, electronic enclosures, and industrial plastic assemblies where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

These thread-forming TRS screws feature precise dimensional specifications including No. 12 screw size, 1-1/4" length, 0.216" thread diameter, and 11 threads per inch. The T27 Torx drive ensures consistent engagement while the pan head design provides optimal clamping surface. Manufacturing complies with industry standards for thread-forming fasteners and includes full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for use in regulated industries and international markets.