S-90627A139 Length 1 1/4" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black zinc-plated steel construction for extended service life in demanding environments
• Reliable thread forming performance in plastic materials without pre-drilled threads, reducing assembly steps and costs
• Optimized drive engagement with No. 2 Phillips pan head design for secure torque transmission and reduced cam-out risk
• Enhanced material integrity through blunt tip and thread forming design that displaces rather than removes plastic material
• Consistent dimensional accuracy meeting ASME B18.6.3 specifications for reliable interchangeability and fit
• Full-threaded design providing maximum holding power across the entire 1-1/4" length in plastic assemblies
• Industry-standard compatibility with recommended No. 19 drill bit (0.166" diameter) for proper hole preparation

Professional Applications & Engineering Value

These thread forming screws deliver exceptional value in plastic assembly applications where traditional fastening methods often fail. The black zinc-plated steel construction provides superior corrosion protection while maintaining the necessary strength for durable plastic connections. The DST thread forming design creates strong, vibration-resistant threads in plastic materials without generating chips or debris that could compromise electrical components or moving parts. The Phillips pan head configuration offers reliable drive engagement for high-volume production environments, while the blunt tip design prevents material splitting in brittle plastics. These No. 12 screws with 16 TPI thread pitch are engineered specifically for plastic substrates where maintaining material integrity during installation is critical to long-term performance.

Specification Summary & Compliance

These thread forming screws feature precise dimensional control with 0.216" thread diameter and 16 TPI thread pitch meeting ASME B18.6.3 manufacturing standards. The black zinc-plated surface treatment provides corrosion resistance while maintaining electrical conductivity. The fasteners are designed for use with No. 19 drill bits (0.166" diameter) for proper hole preparation in plastic materials. Compliance includes meeting industry standards for dimensional accuracy and performance specifications required for reliable plastic fastener applications in commercial and industrial settings.