S-90434A171 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior plastic retention with thread-forming TRS design that creates strong, permanent threads without chipping or cracking materials
• Enhanced corrosion resistance through zinc-plated steel construction for extended service life in industrial environments
• Optimized drive efficiency with Phillips No. 2 drive that prevents cam-out and ensures consistent installation torque
• Maximum material engagement through fully threaded 0.164" diameter with 16 TPI configuration for superior holding power
• Reduced installation torque thanks to Tri-Lobe shank cross-section that minimizes driving resistance while maintaining thread integrity
• Flush mounting capability with standard 82° flat head profile that sits seamlessly in countersunk applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

These No. 8 x 3/4" zinc-plated steel TRS tapping screws deliver exceptional performance in plastic fastening applications where traditional fasteners fail. The thread forming technology eliminates the need for pre-tapped holes while preventing stress cracking in brittle plastics. The Tri-Lobe shank design reduces installation torque by up to 30% compared to standard thread forming screws, minimizing the risk of plastic deformation during assembly. With fully threaded configuration and precise 16 TPI spacing, these screws distribute clamping force evenly across the entire engagement length, preventing localized stress points that compromise plastic components. The zinc-plated finish provides reliable corrosion protection in demanding environments, making these Phillips drive screws ideal for automotive trim, electronic enclosures, and industrial plastic assemblies requiring consistent, vibration-resistant fastening solutions.

Specification Summary & Compliance

These inch-system fasteners feature precise No. 8 screw size with 0.164" thread diameter and 3/4" length, manufactured to exacting dimensional standards for consistent performance. The thread forming TRS type with Tri-Lobe shank cross-section ensures proper thread engagement in plastics when used with recommended No. 23 drill bit (0.154" diameter). The 82° flat head profile accommodates standard countersink angles for flush mounting. All components are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial fastener applications.