S-90390A139 8-32 x 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Maximum torque transfer and reduced cam-out with T15 Torx drive, ensuring secure installation and preventing tool slippage
• Flush, professional finish enabled by the 82° countersink angle and flat head design, ideal for applications requiring a smooth surface
• Excellent holding power in various materials including aluminum, brass, cast iron, and sheet metal due to the thread-cutting Type F design
• Reliable and rapid installation with coarse UNC threads and full threading, providing strong, consistent engagement
• Simplified sourcing and compatibility with standard No. 8-32 UNC thread size and recommended drill bit size #26
• Compliance with environmental standards (RoHS 3), ensuring they meet stringent regulatory requirements for hazardous substances

Professional Applications & Engineering Value

These 8-32 UNC zinc-plated steel tapping screws are engineered to solve common fastening challenges in metalworking and assembly. The thread-cutting (Type F) design allows them to form their own threads in aluminum, brass, cast iron, and sheet metal, eliminating the need for pre-tapped holes and reducing assembly time and cost. The T15 Torx drive provides superior torque transmission compared to traditional drives, minimizing the risk of stripping and ensuring a secure, vibration-resistant connection in high-stress applications. Combined with the 82° flat head profile, they deliver a clean, flush finish that is critical in automotive, machinery, and electronic enclosures where protrusions are not permissible.

Specification Summary & Compliance

This product features a No. 8-32 UNC coarse thread with a right-hand thread direction and is fully threaded for consistent holding strength. It is manufactured to standard inch dimensions, including a head diameter of 0.312" and a length of 1/2". For proper installation, a drill bit size of #26 (0.147" diameter) is recommended. The screws are compliant with RoHS 3 (2015/863/EU), ensuring they are free from restricted hazardous substances, making them suitable for global industrial and commercial use.