S-90087A856 8-32 x 1 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior thread cutting performance with Type F design for reliable fastening in aluminum, brass, cast iron, and sheet metal without pre-tapped holes
• Enhanced corrosion resistance from zinc-plated steel construction, ensuring long-term durability in industrial environments
• Efficient installation with Phillips No. 2 drive for secure torque transfer and reduced cam-out during assembly
• Optimized thread engagement through UNC coarse threads and full threading for strong, vibration-resistant connections
• Wide material compatibility across multiple substrates, reducing inventory needs for diverse applications
• Standardized pan head design provides a low-profile, rounded finish for flush mounting and improved aesthetics
• Precise drilling guidance with recommended No. 20 drill bit (0.147" diameter) for accurate hole preparation

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional value in metalworking and fabrication by eliminating the need for separate tapping operations. The Type F thread cutting geometry and coarse UNC threads aggressively form mating threads in ductile materials like aluminum, brass, cast iron, and sheet metal, reducing assembly time and labor costs. The Phillips No. 2 drive ensures consistent installation torque while the 1-1/4" length provides sufficient engagement for structural integrity. Engineered for high-volume production environments, these self-tapping screws maintain thread integrity under vibration and load, making them ideal for HVAC systems, machinery enclosures, and automotive components where reliable fastening is critical.

Specification Summary & Compliance

This 8-32 x 1-1/4" tapping screw features UNC coarse threads with standard Class 2A tolerance for consistent fit. Manufacturing and dimensional compliance meet ASME B18.6.3 and SAE J933 specifications, ensuring interchangeability and performance reliability. The zinc-plated steel construction provides basic corrosion protection while maintaining mechanical strength. Fully threaded design with blunt tip facilitates precise alignment and penetration in pre-drilled holes using No. 20 drill bits (0.147" diameter).