S-90087A878 12-24 x 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior material strength with zinc-plated steel construction providing excellent corrosion resistance for long-lasting performance in demanding industrial environments
• Effortless installation through self-tapping thread cutting design that eliminates the need for pre-tapped holes, reducing assembly time and labor costs
• Wide material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications with optimal thread engagement
• Enhanced driving efficiency with Phillips No. 3 drive system offering secure tool engagement and reduced cam-out during high-torque applications
• Reliable thread retention featuring UNC coarse thread spacing that maintains secure fastening in soft materials and vibration-prone environments
• Complete thread coverage with fully threaded shank design ensuring maximum holding power along the entire fastener length
• Industry-standard compliance manufactured to ASME B18.6.3 and SAE J933 specifications guaranteeing consistent quality and dimensional accuracy

Professional Applications & Engineering Value

These 12-24 UNC thread cutting screws deliver exceptional engineering value in metal fabrication and assembly operations. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength for durable fastening solutions. The specialized Type F thread cutting design eliminates costly tapping operations by creating precise mating threads during installation, significantly reducing production time in aluminum, brass, cast iron, and sheet metal applications. The coarse UNC thread spacing ensures reliable performance in softer materials where fine threads might strip, while the fully threaded configuration maximizes pull-out resistance. Engineered with Phillips No. 3 drive compatibility, these screws offer familiar, efficient installation using standard industrial tools, making them ideal for high-volume manufacturing environments requiring consistent, reliable fastening performance.

Specification Summary & Compliance

These tapping screws feature precise 12-24 UNC coarse threads with standard Class 2A tolerance for consistent fit and performance. The fasteners are fully compliant with ASME B18.6.3 and SAE J933 specifications, ensuring dimensional accuracy and mechanical properties meet industrial standards. The zinc-plated steel construction provides corrosion resistance while maintaining the required strength characteristics. The screws are designed for use with No. 11 drill bit (0.191" diameter) for proper hole preparation, and feature a standard pan head profile with 1/4" length for versatile application requirements. Manufacturing follows industry-standard quality controls to deliver reliable performance in professional metalworking and assembly applications.