S-90385A354 Length 2 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 holding power in plastic materials through thread forming DST design that creates strong, permanent threads
• Reduced installation damage with blunt tip that minimizes cracking and stress in plastic substrates
• Quick and secure fastening with Phillips No. 2 drive that provides reliable torque transfer and prevents cam-out
• Optimized plastic engagement with 16 TPI thread pitch ensuring maximum pull-out resistance
• Consistent performance assurance through full compliance with ASME B18.6.3 manufacturing standards
• Versatile 2-1/4" length accommodates various plastic thicknesses while maintaining full thread engagement

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are specifically engineered for plastic fastening applications where traditional fasteners fail. The thread forming DST design creates precise mating threads in plastic materials without generating chips, eliminating contamination risks in sensitive assemblies. The rounded pan head profile provides a clean finished appearance while distributing clamping force evenly across the surface. With fully threaded construction and 16 TPI configuration, these screws deliver maximum holding strength in thermoplastics, composites, and other plastic substrates. The Phillips drive system ensures efficient installation in high-volume production environments, making them ideal for plastic fabrication, electronic enclosures, automotive trim, and consumer products manufacturing where reliable, vibration-resistant fastening is critical.

Specification Summary & Compliance

These No. 10 x 2-1/4" tapping screws feature precise dimensional accuracy with 0.19" thread diameter and are manufactured to meet ASME B18.6.3 specifications for quality assurance. The right-hand threaded fasteners utilize thread forming technology (DST type) with recommended No. 27 drill bit (0.144" diameter) for proper hole preparation. The zinc-plated steel construction provides corrosion protection, while the fully threaded design ensures consistent performance across the entire fastener length. Compliance with industry standards guarantees reliable performance in professional plastic fastening applications.