S-90385A316 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 various environments
• Efficient thread forming using DST technology creates strong, permanent threads in plastic without pre-drilling
• Excellent driving control with Phillips No. 1 drive style prevents cam-out and ensures secure installation
• Maximum holding power from fully threaded 1/4" length with 28 TPI precision for reliable plastic fastening
• Optimized head design with standard pan profile provides consistent clamping force and professional appearance
• Reduced assembly time with self-tapping capability that eliminates the need for separate tapping operations
• Industry-standard compliance meeting ASME B18.6.3 specifications ensures consistent quality and performance

Professional Applications & Engineering Value

These No. 3 zinc-plated steel tapping screws deliver exceptional engineering value for plastic assembly applications where vibration resistance and long-term reliability are critical. The DST thread forming technology creates precise, durable threads in plastic materials without generating chips, eliminating contamination concerns in sensitive applications. The fully threaded design with 28 TPI provides maximum engagement surface area, distributing stress evenly to prevent material cracking or stripping. The zinc-plated finish offers reliable corrosion protection in environments where moisture or chemical exposure may be present, while the Phillips drive system ensures efficient installation with standard tools. These thread forming screws are engineered specifically for plastic fastening challenges, providing superior pull-out resistance compared to conventional screws in thermoplastic and thermoset applications.

Specification Summary & Compliance

These tapping screws feature precise 0.099" thread diameter with 28 TPI thread pitch and 1/4" fully threaded length for consistent performance. The pan head design with 0.167" head diameter and Phillips No. 1 drive ensures reliable installation. Manufactured to meet ASME B18.6.3 specifications for dimensional accuracy and performance standards, these screws provide guaranteed compatibility and reliability for industrial plastic fastening applications. The thread forming design eliminates the need for threaded inserts in plastic components.