S-90485A390 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in demanding environments
• Exceptional holding power in plastic materials thanks to the tri-lobe shank design that creates secure, vibration-resistant threads
• Efficient installation and flush finish with standard flat head profile and 82° countersink angle for seamless surface integration
• Reliable drive engagement through Phillips No. 3 drive style, reducing cam-out during installation
• Maximum thread engagement with fully threaded design ensuring consistent fastening strength along the entire 1 1/4" length
• Reduced assembly steps as these thread forming screws eliminate the need for pre-tapped holes in plastic components
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for global industrial applications

Professional Applications & Engineering Value

These 1/4"-10 TRS thread forming screws are specifically engineered to address common fastening challenges in plastic assembly applications. The 18-8 stainless steel composition provides excellent corrosion resistance while maintaining sufficient ductility for the thread forming process. The tri-lobe shank cross-section displaces plastic material during installation, creating strong, permanent threads without generating chips that could interfere with electronic components or mechanisms. This design eliminates stripping issues common in plastic fastening while providing superior pull-out resistance. The flat head with Phillips drive ensures secure installation with standard tools, and the fully threaded configuration guarantees consistent clamping force throughout the joint. Ideal for plastic enclosures, automotive trim, electrical housings, and consumer products, these screws deliver reliable performance where vibration resistance and material integrity are critical.

Specification Summary & Compliance

These tapping screws feature precision 1/4"-10 thread with right-hand direction and TRS (Thread Rolling Screw) type designation. The flat head maintains a standard profile with 0.477" diameter and 0.153" height, designed for 82° countersink applications. Manufactured to industry standards for thread forming screws, these fasteners are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet current environmental and safety requirements for industrial use worldwide.