S-99512A639 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T20 Torx drive design, reducing cam-out and tool wear during installation
• Exceptional corrosion resistance through zinc-plated steel construction, ensuring longevity in various environments
• Reliable thread forming capability with TRS Tri-Lobe shank design, creating strong, vibration-resistant threads in plastic materials
• Optimal holding power with fully threaded 5/8" length and No. 8 diameter, providing maximum engagement in plastic applications
• Simplified installation process with standard pan head profile and blunt tip, preventing material damage during fastening
• Precision compatibility with No. 23 drill bit (0.154" diameter), ensuring proper hole sizing for secure thread formation
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe industrial use

Professional Applications & Engineering Value

These No. 8 zinc-plated steel tapping screws with T20 Torx drive are engineered specifically for plastic fastening applications where reliable thread formation and vibration resistance are critical. The thread forming TRS design with Tri-Lobe shank cross-section displaces plastic material to create permanent, high-strength threads without chips or debris, eliminating the risk of contamination in sensitive assemblies. The zinc-plated steel construction provides essential corrosion protection for industrial environments, while the fully threaded 5/8" length ensures maximum engagement depth for superior pull-out resistance. These thread forming screws are ideal for automotive plastic components, electronic enclosures, and consumer products where secure fastening in thermoplastic materials is required.

Specification Summary & Compliance

These No. 8 tapping screws feature a 0.164" thread diameter with 16 threads per inch and right-hand threading, manufactured to precise dimensional standards for consistent performance. The thread forming design follows TRS (Thread Rolling Screw) specifications with Tri-Lobe shank geometry for optimal plastic engagement. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability. The pan head configuration with T20 Torx drive provides reliable fastening with standard industrial tools, while the 5/8" length offers versatile application coverage for various plastic thicknesses.