S-90485A280 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for humid or demanding industrial environments.
• Excellent thread retention in plastic due to the Tri-Lobe shank design, which forms strong, reliable threads without pre-tapping.
• Efficient installation and flush finish provided by the Phillips No. 2 drive and standard 82° flat head, reducing assembly time and preventing snagging.
• High pull-out strength from the thread-forming (TRS) design and fully threaded shank, ensuring a secure, vibration-resistant hold in plastic substrates.
• Wide material compatibility with various plastics, as indicated by the recommended No. 29 drill bit (0.136" diameter) for precise pilot holes.
• Regulatory compliance assurance with RoHS 3 and REACH, making these screws safe for use in regulated industries and global markets.
• Consistent performance with a right-hand thread, 16 TPI, and blunt tip for controlled penetration and reduced risk of material splitting.

Professional Applications & Engineering Value

These 18-8 stainless steel TRS tapping screws are engineered to address common challenges in plastic fastening, such as strip-out, cracking, and corrosion. The thread-forming Tri-Lobe shank displaces plastic material to create robust, permanent threads without chips, enhancing pull-out strength and vibration resistance. This design is critical for applications in electronics enclosures, automotive components, and consumer appliances, where reliable fastening and material integrity are paramount. The Phillips flat head with an 82° countersink angle ensures a smooth, flush surface, improving aesthetics and safety. Made from durable 18-8 stainless steel, these screws resist rust and wear, extending service life in indoor and mild outdoor environments while meeting strict industry standards for performance and safety.

Specification Summary & Compliance

This No. 8 x 3/4" screw features a 0.164" thread diameter with 16 TPI and a Tri-Lobe shank cross-section for thread-forming applications in plastic. It complies with common inch-system tolerances and is designed for use with a No. 29 drill bit (0.136" diameter). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for industrial and consumer applications.