S-90485A120 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in humid or chemically exposed environments.
• Excellent thread retention in plastic due to the Tri-Lobe shank design, which displaces material to form strong, vibration-resistant threads without pre-tapping.
• Effortless installation and flush finish with a standard 82° flat head profile and Phillips No. 1 drive, allowing for quick, secure fastening and a smooth surface.
• High thread engagement with 28 threads per inch and full threading, providing maximum holding power and pull-out resistance in plastic assemblies.
• Reduced risk of material cracking as the thread forming (TRS) design compresses rather than cuts plastic, maintaining structural integrity.
• Environmental compliance assurance by meeting RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices.
• Broad compatibility with recommended No. 48 drill bit (0.076" diameter), ensuring precise fit and optimal performance in various plastic materials.

Professional Applications & Engineering Value

These No. 2 TRS thread forming screws are engineered to address common challenges in plastic assembly, such as stripping, loosening under vibration, and corrosion. The 18-8 stainless steel material offers exceptional durability and resistance to rust, making these plastic fasteners ideal for outdoor equipment, electronic enclosures, and automotive components. The Tri-Lobe shank cross-section and thread forming action create tight, secure threads that enhance holding power without requiring tapped holes, reducing assembly time and tooling costs. With a Phillips flat head and standard countersink angle, they ensure a clean, flush finish in applications where aesthetics and safety are priorities. This design minimizes stress concentration in plastic materials, preventing cracks and extending product life in demanding industrial settings.

Specification Summary & Compliance

This screw features a thread diameter of 0.086" with 28 TPI and is fully threaded for consistent engagement. It adheres to standard inch measurements, with precise dimensions including a 5/16" length, No. 1 Phillips drive, and 82° countersink angle. Manufactured to common industrial specifications for thread forming tapping screws, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances and suitable for global supply chains.