S-99512A659 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx T10 drive, reducing cam-out and tool wear during installation
• Exceptional plastic retention through Tri-Lobe shank design that creates strong, vibration-resistant threads in plastic materials
• Enhanced corrosion resistance with black-oxide steel finish, providing durable protection in various industrial environments
• Optimal thread engagement with fully threaded 5/8" length and 20 TPI precision for maximum holding power in plastic assemblies
• Reduced installation stress through thread forming design that displaces material without cutting, minimizing cracking in plastic components
• Streamlined assembly process with right-hand threading and blunt tip for easy starting and consistent driving performance
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in industrial applications

Professional Applications & Engineering Value

These No. 4-20 thread forming screws are specifically engineered to address common challenges in plastic assembly applications where material integrity and joint reliability are critical. The black-oxide steel construction provides essential corrosion protection while maintaining the mechanical strength needed for durable fastening. The TRS (Thread Rolling Screw) design with Tri-Lobe shank profile creates strong, permanent threads in plastic substrates without generating chips or debris that could compromise electronic components or sensitive mechanisms. This thread forming technology significantly reduces the risk of plastic cracking during installation, making these Torx T10 tapping screws ideal for automotive trim, electronic enclosures, appliance components, and other precision plastic assemblies requiring vibration resistance and long-term reliability.

Specification Summary & Compliance

These tapping screws feature a No. 4-20 thread size with Class 2A tolerance, 5/8" fully threaded length, and are manufactured to industry standards for thread forming screws in plastic applications. The black-oxide surface treatment enhances durability while maintaining dimensional accuracy. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance adherence for industrial use. Recommended drill size: No. 37 (0.104" diameter) for optimal thread formation in plastic materials.