S-90385A312 Length 1/4" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Excellent vibration resistance through fully threaded design and 32 TPI precision, preventing loosening in plastic assemblies
• Reduced installation stress with DST thread forming technology that creates strong threads without chip removal
• Enhanced torque transmission via No. 1 Phillips drive, minimizing cam-out during installation
• Optimized plastic fastening with blunt tip design that prevents material cracking during thread formation
• Reliable dimensional consistency meeting ASME B18.6.3 specifications for uniform performance across production runs
• Versatile pan head design providing a standard profile for broad compatibility with various assembly requirements

Professional Applications & Engineering Value

These No. 2 zinc-plated steel tapping screws deliver exceptional value in plastic fastening applications where material integrity is paramount. The DST thread forming technology creates permanent, high-strength threads in plastic substrates without generating chips that could contaminate sensitive components. The combination of fully threaded 1/4" length and 32 TPI precision ensures maximum thread engagement and superior resistance to vibrational loosening, critical in automotive, electronics, and consumer product assemblies. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for durable plastic-to-plastic and plastic-to-metal connections, making these thread forming screws ideal for high-volume manufacturing environments demanding reliability and consistency.

Specification Summary & Compliance

These tapping screws feature precision right-hand threads with standard thread tolerances, manufactured to exacting ASME B18.6.3 specifications for dimensional accuracy and performance reliability. The 0.086" thread diameter with 32 threads per inch provides optimal engagement in plastics when used with the recommended No. 50 drill bit (0.07" diameter). The pan head style with 0.167" head diameter and No. 1 Phillips drive ensures consistent installation performance. Compliance with industry standards guarantees interchangeability and reliable performance in industrial plastic fastening applications.