S-99512A657 Length 3/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T10 Torx drive prevents cam-out and ensures reliable installation in plastic assemblies
• Secure thread forming capability through tri-lobe shank design creates permanent, vibration-resistant threads in plastic materials
• Enhanced corrosion resistance from Black-Oxide steel construction extends service life in various industrial environments
• Precise installation control with blunt tip design prevents material damage and ensures accurate screw placement
• Maximum holding power through fully threaded 20 TPI configuration provides superior pull-out resistance in plastic applications
• Reduced assembly time with thread-forming design eliminates the need for pre-tapped holes in plastic components
• Environmental compliance assurance meeting RoHS 3 and REACH standards for use in regulated industries

Professional Applications & Engineering Value

These No. 4 TRS thread forming screws are specifically engineered to address common challenges in plastic fastening applications where traditional fasteners often fail. The Black-Oxide steel construction provides essential corrosion protection while maintaining the necessary strength for durable plastic assemblies. The innovative tri-lobe shank design displaces plastic material during installation, creating strong, permanent threads that resist vibration loosening and pull-out forces. The T10 Torx drive system delivers maximum torque transfer without stripping, crucial for consistent installation in automated assembly lines. These thread forming screws for plastic eliminate the need for additional tapping operations, reducing assembly time and costs while providing reliable performance in electronic enclosures, automotive plastic components, and consumer product assemblies where material integrity and long-term fastening security are paramount.

Specification Summary & Compliance

This No. 4 x 3/8" TRS tapping screw features precise inch system dimensions with 0.112" thread diameter and 20 threads per inch configuration. The thread forming design follows standard TRS specifications for plastic applications, requiring a No. 37 drill bit (0.104" diameter) for proper installation. Manufacturing and material compliance includes full adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring these fasteners meet the strictest industry standards for hazardous substance restrictions and chemical safety in industrial applications.