S-99512A664 Length 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior torque transmission with T15 Torx drive, reducing cam-out and tool wear for reliable installation
• Exceptional plastic retention through TRS thread-forming design that creates strong, permanent threads without pre-tapping
• Enhanced corrosion resistance with Black-Oxide Steel finish, extending service life in demanding environments
• Optimized material displacement via Tri-Lobe shank cross-section, minimizing stress cracking in plastic applications
• Maximum thread engagement with fully threaded design and 19 threads per inch, ensuring superior holding power
• Streamlined installation process with blunt tip and right-hand threading for efficient assembly operations
• Reduced assembly costs through thread-forming action that eliminates the need for separate tapping operations

Professional Applications & Engineering Value

These No. 6 plastic tapping screws deliver exceptional engineering value in plastic fastening applications where material integrity is critical. The TRS thread-forming design with Tri-Lobe shank strategically displaces plastic material during installation, creating strong mating threads while significantly reducing the risk of stress cracking that commonly plagues conventional fastening methods. The Black-Oxide Steel construction provides essential corrosion protection for industrial environments, while the T15 Torx drive ensures maximum torque transfer without slippage, making them ideal for high-volume production settings. These fully threaded screws maintain consistent 19 TPI spacing for uniform load distribution, offering reliable performance in electronic enclosures, automotive components, and consumer products where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Precision-engineered to exacting standards with 0.138" thread diameter and 1/4" length, these tapping screws feature right-hand threading and blunt tip configuration for controlled installation. Manufactured with Class 2A thread tolerances for consistent performance, they are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. The TRS thread-forming design follows industry-standard specifications for plastic fastening applications.