S-99512A656 Length 5/16" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T10 Torx drive design, preventing cam-out and reducing tool wear during installation
• Excellent plastic material compatibility through TRS thread forming technology, eliminating chips and creating strong, permanent threads
• Enhanced corrosion resistance with Black-Oxide Steel finish, providing durable protection in various industrial environments
• Secure anti-rotation performance thanks to tri-lobe shank design that prevents loosening under vibration and thermal cycling
• Optimized for plastic assembly with No. 4 size and 5/16" length, offering ideal fastening solutions for plastic components and enclosures
• Complete thread engagement with fully threaded 20 TPI design, ensuring maximum holding power throughout the fastener length
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global manufacturing requirements

Professional Applications & Engineering Value

These No. 4 TRS thread forming screws are specifically engineered to address common challenges in plastic assembly applications. The tri-lobe shank cross-section and thread forming design create strong, permanent threads in plastic materials without generating chips or stress cracks that can compromise structural integrity. The T10 Torx drive system ensures maximum torque transmission while minimizing strip-out risks during high-volume production. Made from Black-Oxide Steel, these fasteners provide enhanced corrosion resistance suitable for electronics enclosures, automotive plastic components, and industrial equipment where vibration resistance and long-term reliability are critical. The combination of 0.112" thread diameter and 5/16" length offers optimal fastening solutions for thin plastic sections and assemblies requiring precise clamp force distribution.

Specification Summary & Compliance

These thread forming screws feature a No. 4 screw size with 0.112" thread diameter and 20 threads per inch fully threaded design. The TRS thread forming configuration with tri-lobe shank ensures proper installation in plastic materials when used with recommended No. 37 drill bit (0.104" diameter). Manufactured to industry standards for thread forming screws in plastic applications, these fasteners are RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for industrial use.