S-90385A148 Length 1/2" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Efficient thread-forming design eliminates the need for pre-tapped holes in plastic, reducing assembly time and labor costs.
• Zinc-plated steel construction provides reliable corrosion resistance, extending the screw's lifespan in various industrial environments.
• Phillips drive with No. 2 size ensures secure, slip-resistant installation for consistent fastening performance.
• Fully threaded blunt tip allows for smooth, controlled insertion without damaging plastic materials.
• Standard pan head profile offers a low-profile finish and even clamping force for stable plastic assemblies.
• Compliance with ASME B18.6.3 guarantees dimensional accuracy and interchangeability, ensuring reliable performance in demanding applications.
• RoHS 3 certification confirms environmental safety, making these screws suitable for regulated industries and sustainable practices.

Professional Applications & Engineering Value

These No. 6 x 1/2" tapping screws are engineered specifically for plastic fastening applications, where traditional screws may strip threads or cause material stress. The thread-forming DST design creates strong, permanent threads in plastic substrates without requiring pre-drilled or tapped holes, significantly streamlining production processes. Made from zinc-plated steel, they resist corrosion in humid or industrial settings, while the Phillips drive ensures easy installation with standard tools. Ideal for electronics enclosures, automotive components, and consumer goods, these screws provide reliable holding power and reduce the risk of plastic cracking, enhancing product durability and assembly efficiency.

Specification Summary & Compliance

This tapping screw features a thread diameter of 0.138" with approximately 19 threads per inch and a right-hand thread direction, ensuring precise engagement in plastic materials. It meets ASME B18.6.3 specifications for dimensional tolerances and performance, and is RoHS 3 (2015/863/EU) compliant for environmental safety. The screw's blunt tip and fully threaded design provide consistent fastening, with a recommended drill bit size of No. 35 (0.11" diameter) for optimal installation in plastic applications.