S-90385A333 Length 7/16" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-lasting performance in demanding industrial environments
• Excellent thread-forming capability with DST design, creating strong, permanent threads in plastic materials without pre-tapping
• Optimized drive efficiency featuring Phillips No. 2 drive for secure tool engagement and reduced cam-out during installation
• Maximum holding power with fully threaded 7/16" length and 19 threads per inch design for superior pull-out resistance in plastic assemblies
• Enhanced assembly precision with rounded pan head profile that provides consistent seating and professional finish
• Industry-standard compatibility designed for use with No. 35 drill bit (0.11" diameter) for proper hole preparation and optimal performance
• Reliable right-hand threading ensures standard installation procedures and compatibility with existing assembly processes

Professional Applications & Engineering Value

These No. 6 zinc-plated steel tapping screws are specifically engineered to address common challenges in plastic assembly applications where traditional fastening methods often fail. The DST thread forming design eliminates the need for pre-tapped holes, reducing assembly time and labor costs while creating stronger, more reliable connections in plastic substrates. The zinc-plated steel construction provides essential corrosion protection for industrial environments, while the Phillips No. 2 drive system ensures efficient installation with standard tools. These thread forming screws are particularly valuable in electronics enclosures, automotive plastic components, and consumer products where vibration resistance and long-term reliability are critical. The combination of 0.138" thread diameter and 19 threads per inch creates optimal stress distribution in plastic materials, preventing cracking and material failure common with improper fastener selection.

Specification Summary & Compliance

These tapping screws feature precise dimensional accuracy with 0.138" thread diameter and 19 threads per inch configuration, manufactured to exacting ASME B18.6.3 standards for consistent quality and performance. The fully threaded 7/16" length and right-hand threading comply with industry-standard installation requirements. The zinc-plated steel material meets corrosion resistance specifications, while the DST thread forming design ensures reliable performance in plastic applications when used with the recommended No. 35 drill bit (0.11" diameter) for proper hole preparation.