S-90087A103 2-56 x 3/8" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Corrosion-resistant zinc-plated steel construction ensures long-lasting durability in demanding industrial environments
• Self-tapping thread cutting design eliminates the need for pre-tapped holes, reducing installation time and labor costs
• Type F thread cutting profile provides superior holding power in aluminum, brass, cast iron, and sheet metal applications
• Phillips No. 1 drive system offers reliable torque transmission and reduces cam-out during installation
• Coarse UNC threading with full thread engagement delivers faster installation and stronger pull-out resistance
• Precision-engineered pan head design provides optimal bearing surface while maintaining a low-profile appearance
• Standardized No. 49 drill bit compatibility ensures consistent performance across manufacturing operations

Professional Applications & Engineering Value

These 2-56 UNC zinc-plated steel tapping screws solve critical fastening challenges in metal fabrication and assembly operations. The specialized Type F thread cutting design creates precise mating threads in various materials including aluminum, brass, cast iron, and sheet metal without requiring pre-tapped holes. This eliminates tapping operations and reduces assembly time significantly. The coarse UNC threading provides excellent chip clearance during installation, preventing binding in deep applications. With zinc-plated corrosion protection, these screws maintain integrity in environments where moisture or chemical exposure could compromise fastener performance. The combination of Phillips No. 1 drive and standardized 3/8" length makes them ideal for high-volume production environments requiring consistent, reliable fastening solutions.

Specification Summary & Compliance

These precision tapping screws feature 2-56 UNC coarse threading with Class 2A tolerance standards, ensuring consistent fit and performance. Manufacturing specifications strictly adhere to ASME B18.6.3 standards (SAE J933) for dimensional accuracy and mechanical properties. The products are fully RoHS 3 (2015/863/EU) compliant, meeting international environmental regulations for hazardous substance restrictions. The thread cutting Type F design is optimized for use with No. 49 drill bits (0.073" diameter), providing engineers with reliable drilling and fastening system compatibility.