S-99512A625 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Enhanced torque transmission through T10 Torx drive design, reducing cam-out and tool slippage during installation
• Exceptional holding power in plastic materials with thread-forming TRS design that creates strong, permanent threads without chips
• Reduced installation torque requirements thanks to tri-lobe shank design that displaces material efficiently
• Complete thread engagement with fully threaded design for maximum pull-out strength across the entire fastener length
• Simplified alignment and installation with blunt tip design that prevents damage to plastic components
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing applications

Professional Applications & Engineering Value

These No. 4 zinc-plated steel tapping screws deliver exceptional performance in plastic fastening applications where reliability and vibration resistance are critical. The thread-forming TRS design with tri-lobe shank cross-section creates permanent, high-strength threads in plastic substrates without generating chips that could contaminate sensitive assemblies. The T10 Torx drive system provides superior torque transmission compared to traditional drive types, reducing installation failures and improving production efficiency. With a 1-1/2" length and fully threaded blunt tip, these screws offer complete engagement in plastic components ranging from electronic enclosures to automotive trim, ensuring secure fastening while preventing material damage during installation.

Specification Summary & Compliance

This No. 4 x 1-1/2" plastic tapping screw features a 0.112" thread diameter with 20 threads per inch in right-hand orientation, manufactured to precise dimensional standards. The pan head style with 0.219" head diameter provides optimal bearing surface for plastic applications. Installation requires a No. 37 drill bit (0.104" diameter) for proper hole preparation. These thread-forming screws comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial and commercial applications worldwide.