S-90385A144 Length 1/4" 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 various environments
• Excellent vibration resistance through DST thread forming technology that creates permanent, secure fastening in plastic materials
• Optimized torque transfer with Phillips No. 2 drive design that minimizes cam-out and ensures efficient installation
• Complete thread engagement with fully threaded 19 TPI design for maximum holding power throughout the fastener length
• Streamlined installation process using standard No. 35 drill bit (0.11" diameter) for precise hole preparation
• Reliable performance compliance meeting ASME B18.6.3 specifications and RoHS 3 environmental regulations
• Versatile plastic fastening solution with blunt tip and thread forming design that prevents material cracking and stripping

Professional Applications & Engineering Value

These zinc-plated steel DST thread forming screws deliver exceptional value in plastic assembly applications where traditional fastening methods often fail. The thread forming technology creates strong, vibration-resistant joints by displacing plastic material rather than cutting it, eliminating chips and reducing stress concentrations. The fully threaded design with 19 TPI ensures maximum surface contact area, providing superior pull-out resistance in thermoplastic and thermoset materials. The Phillips No. 2 drive system offers reliable torque transmission during installation, while the pan head style provides a low-profile finish suitable for various industrial applications. These features combine to solve common plastic fastening challenges including material cracking, thread stripping, and vibration-induced loosening.

Specification Summary & Compliance

These No. 6 x 1/4" tapping screws feature precise dimensional accuracy with 0.138" thread diameter and 19 threads per inch configuration. Manufactured to meet ASME B18.6.3 standards for dimensional consistency and performance reliability. The screws are fully compliant with RoHS 3 (2015/863/EU) regulations, ensuring environmental safety and restricted substance compliance. The thread forming (DST) design follows industry-standard specifications for plastic fastening applications, requiring No. 35 drill bit (0.11" diameter) for proper hole preparation and optimal performance.