S-90385A342 Length 1" 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 industrial environments
• Excellent thread-forming capability with DST design creates secure, permanent threads in plastic materials without pre-tapping
• Optimized plastic engagement featuring 19 TPI thread pitch and blunt tip design to prevent material cracking and stripping
• Reliable driving performance with Phillips No. 2 drive ensuring consistent installation torque and reduced cam-out
• Maximum thread engagement through fully threaded design provides superior holding power across the entire screw length
• Standardized pan head profile offers balanced bearing surface for secure fastening without excessive penetration
• Industry-compliant quality manufactured to ASME B18.6.3 specifications ensuring dimensional accuracy and performance reliability

Professional Applications & Engineering Value

These No. 7 thread forming screws are specifically engineered for plastic assembly applications where traditional fastening methods often lead to material failure. The zinc-plated steel construction provides essential corrosion protection while maintaining the strength required for durable plastic connections. The unique DST thread forming design displaces plastic material rather than cutting it, creating stronger threads that resist pull-out and vibration loosening. With their 19 TPI thread pitch and blunt tip configuration, these screws distribute stress evenly throughout the plastic substrate, preventing the cracking and material deformation common in brittle polymers. The Phillips No. 2 drive system ensures consistent installation torque across production runs, making them ideal for automated assembly processes in electronics enclosures, automotive trim components, and industrial plastic housings.

Specification Summary & Compliance

These thread forming tapping screws feature precise dimensional specifications including 0.151" thread diameter, 1" length, and standard pan head design with 0.27" diameter. Manufactured to ASME B18.6.3 standards, they ensure consistent thread form and mechanical properties. The screws are fully threaded with right-hand orientation and are designed for use with 1/8" drill bits (0.125" diameter). The zinc-plated surface treatment provides corrosion resistance while maintaining compatibility with various plastic materials, offering reliable performance in demanding industrial applications.