S-90385A197 Length 3/4" ASME B18.6.3 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term reliability in humid or industrial environments
• Excellent thread-forming capability with DST design, creating strong, permanent threads in plastic materials without pre-tapping
• Optimized for plastic applications with blunt tip and thread forming method to prevent material cracking and ensure secure fastening
• Enhanced driving efficiency with No. 2 Phillips drive and pan head design for quick installation and reduced tool slippage
• Consistent performance with fully threaded shank providing maximum holding power across the entire fastener length
• Industry-standard compatibility with No. 30 drill bit (0.1285") for precise hole preparation and optimal thread engagement
• Reliable dimensional accuracy with 18 threads per inch and 0.164" thread diameter ensuring precise fit and consistent performance

Professional Applications & Engineering Value

These zinc-plated steel tapping screws are specifically engineered for plastic fastening applications where traditional fasteners often fail. The DST thread-forming design eliminates the need for pre-tapped holes, reducing assembly time and labor costs while creating strong, vibration-resistant connections. The rounded pan head with Phillips drive provides excellent torque transmission and flush seating, making them ideal for electronic enclosures, automotive plastic components, and consumer products where appearance matters. The zinc plating offers essential corrosion protection, extending service life in environments where moisture or chemical exposure could compromise fastener integrity. These screws solve common plastic assembly challenges by preventing material stress cracking while delivering maximum holding power in thermoplastic and thermoset applications.

Specification Summary & Compliance

This No. 8 x 3/4" tapping screw features precise dimensional specifications including 0.164" thread diameter, 18 threads per inch, and standard inch system measurements. Manufactured to meet ASME B18.6.3 standards for quality assurance and performance reliability. The product is fully RoHS 3 (2015/863/EU) compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications. The thread forming tapping method and right-hand thread direction follow industry-standard practices for plastic fastening systems.