S-90627A112 Length 5/16" 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
• Exceptional holding power in plastic materials through thread forming design that creates strong, permanent threads without chip removal
• Optimized drive efficiency with Phillips No. 1 drive style providing reliable torque transfer and reduced cam-out risk
• Maximum thread engagement with fully threaded design ensuring complete fastening strength along the entire screw length
• Reduced material stress featuring blunt tip design that minimizes cracking in plastic substrates during installation
• Precision compatibility with No. 44 drill bit (0.086") for proper hole preparation and optimal thread formation
• Industry-standard reliability meeting ASME B18.6.3 specifications for consistent performance and interchangeability

Professional Applications & Engineering Value

This No. 4-24 thread forming tapping screw delivers exceptional engineering value in plastic fastening applications where traditional fasteners often fail. The DST thread forming design creates strong, permanent threads in plastic materials without generating chips, eliminating contamination risks in sensitive assemblies. The black zinc-plated steel construction provides superior corrosion protection while maintaining the mechanical strength required for demanding industrial environments. With its fully threaded configuration and pan head design, this screw ensures maximum clamping force distribution and reliable performance in automotive components, electronic enclosures, and consumer products where vibration resistance and long-term durability are critical. The combination of right-hand threading and Phillips drive system enables efficient installation while the blunt tip prevents material damage during assembly.

Specification Summary & Compliance

This heavy-duty fastener features precision No. 4-24 thread specifications with 0.112" thread diameter and 24 threads per inch, manufactured to Class 2A thread tolerances for consistent performance. The screw complies with ASME B18.6.3 standards for dimensional accuracy and mechanical properties, ensuring reliable interchangeability in industrial applications. The 5/16" length and fully threaded design provide optimal engagement depth for plastic materials, while the black zinc plating meets industry requirements for corrosion protection. The product is designed for use with No. 44 drill bits (0.086" diameter) to achieve proper hole preparation and optimal thread formation in plastic substrates.