S-99512A622 Length 7/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T10 Torx drive design that minimizes cam-out and tool slippage during installation
• Exceptional vibration resistance through the Tri-Lobe shank cross-section that creates permanent, secure threads in plastic materials
• Corrosion-resistant protection provided by zinc-plated steel construction for extended service life in various environments
• Reduced installation stress with thread-forming design that eliminates chip formation and prevents material damage
• Enhanced driving efficiency through fully threaded design and blunt tip for precise alignment and consistent performance
• Reliable regulatory compliance meeting RoHS 3 and REACH standards for environmentally conscious manufacturing operations
• Optimized for plastic applications with specialized TRS screw geometry that ensures strong, lasting fastening in plastic assemblies

Professional Applications & Engineering Value

These No. 4-20 plastic tapping screws deliver exceptional engineering value in industrial fastening applications where reliability is paramount. The zinc-plated steel construction provides durable corrosion resistance, while the Tri-Lobe shank design and thread-forming TRS technology create permanent, vibration-resistant threads in plastic materials without generating chips or stress cracks. The T10 Torx drive ensures maximum torque transmission, reducing installation time and preventing fastener damage. Ideal for plastic assembly in automotive components, electronic enclosures, and consumer products, these screws solve common challenges of strip-out, loosening, and material failure. Their fully threaded configuration and blunt tip facilitate precise alignment and consistent clamping force, making them essential for production environments requiring repeatable, high-quality fastening solutions in plastic substrates.

Specification Summary & Compliance

These thread-forming TRS screws feature precise No. 4-20 thread specifications with 20 threads per inch and 7/8" length. The Tri-Lobe shank cross-section and thread forming design create secure fastening in plastic materials when used with the recommended No. 37 drill bit (0.104" diameter). Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. The zinc-plated steel construction and right-hand thread configuration provide reliable performance in industrial applications requiring consistent fastening solutions.