S-90385A341 Length 1/2" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Efficient thread-forming design creates strong, permanent threads in plastic materials without pre-tapping
• Optimized for plastic applications with DST thread type and blunt tip to prevent material cracking and splitting
• Reliable drive performance featuring Phillips No. 2 drive for secure installation and reduced cam-out
• Full threading coverage along the 1/2" length ensures maximum holding power and uniform stress distribution
• Standard-compliant manufacturing meeting ASME B18.6.3 specifications for consistent quality and dimensional accuracy
• Versatile pan head design with 0.27" diameter provides excellent bearing surface and professional appearance

Professional Applications & Engineering Value

These No. 7 zinc-plated steel tapping screws deliver exceptional engineering value in plastic assembly applications where material integrity is paramount. The thread-forming DST design eliminates the need for pre-tapped holes, reducing installation time and labor costs while creating strong, reliable threads that resist stripping and back-out. The zinc-plated steel construction provides essential corrosion protection for industrial environments, while the Phillips No. 2 drive ensures consistent torque transmission during high-volume assembly operations. With 19 threads per inch and fully threaded configuration, these screws distribute clamping force evenly across the entire engagement length, preventing stress concentration points that can lead to plastic failure. The blunt tip design specifically addresses common plastic assembly challenges by preventing material cracking during installation, making them ideal for automotive trim, electronic enclosures, and consumer product manufacturing.

Specification Summary & Compliance

These thread forming screws feature precise dimensional specifications including 0.151" thread diameter, 1/2" length, and 19 TPI thread pitch with right-hand threading. The manufacturing process strictly adheres to ASME B18.6.3 standards ensuring consistent quality, dimensional accuracy, and reliable performance. The zinc-plated steel material provides corrosion resistance while maintaining the mechanical strength required for plastic fastening applications. All components are fully threaded with standard Class 2A thread tolerances for optimal fit and performance in industrial settings.