S-90485A170 Length 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh environments
• Excellent thread-forming capability with TRS Tri-Lobe shank design that creates strong, permanent threads in plastic materials
• Secure flush mounting with standard 82° flat head profile that sits perfectly countersunk in plastic applications
• Reliable driving performance with No. 1 Phillips drive that provides positive torque transfer and reduces cam-out
• Maximum holding power through fully threaded design that ensures complete engagement along the entire 1/2" length
• Reduced installation stress with thread forming technology that minimizes cracking in plastic substrates
• Compliance assurance meeting RoHS 3 and REACH regulations for use in regulated industrial applications

Professional Applications & Engineering Value

These 18-8 stainless steel TRS tapping screws are specifically engineered for plastic fastening applications where material integrity and long-term performance are critical. The thread forming design with Tri-Lobe shank cross-section displaces plastic material rather than cutting it, creating zero clearance threads that provide exceptional resistance to vibration loosening and pull-out forces. The Phillips flat head configuration with standard 82° countersink angle ensures flush mounting in plastic enclosures, electronic housings, and automotive plastic components. This combination of corrosion-resistant material and advanced thread forming technology solves common plastic fastening challenges including stress cracking, thread stripping, and chemical degradation in industrial environments.

Specification Summary & Compliance

These No. 4-20 x 1/2" TRS tapping screws feature inch system measurements with fully threaded right-hand direction and 20 threads per inch precision. The manufacturing follows standard thread forming specifications with blunt tip design optimized for plastic applications. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet the latest environmental and safety standards for industrial use across global markets.