S-90420A590 Length 2 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanic-barrier coated 18-8 stainless steel construction, ideal for harsh industrial environments
• Efficient installation in tough materials thanks to the integrated drilling tip that eliminates pre-drilling in steel, stainless steel, and sheet metal
• Enhanced grip and load distribution from the flanged hex head design, preventing loosening under vibration
• High-strength thread forming capability with BSD type tapping, creating durable, strip-resistant threads in base materials
• Quick and secure fastening with external hex drive, allowing for high torque application and easy installation
• Maximum material penetration with 2-1/2" fully threaded length and No. 3 drill tip, capable of drilling up to 0.187" thickness
• Consistent performance with precise No. 12-14 thread specifications ensuring reliable engagement in various metal applications

Professional Applications & Engineering Value

These thread forming tapping screws with drilling tip technology solve critical challenges in metal fabrication and assembly. The galvanic-barrier coated 18-8 stainless steel construction prevents galvanic corrosion when joining dissimilar metals, while the flanged hex head provides superior clamping force without requiring separate washers. The BSD thread forming design creates stronger, more reliable threads in steel, stainless steel, and sheet metal applications by displacing material rather than removing it, resulting in improved fatigue resistance and vibration performance. This combination of features makes them ideal for HVAC systems, electrical enclosures, and industrial equipment where corrosion resistance and structural integrity are paramount.

Specification Summary & Compliance

Manufactured to precise inch system specifications with No. 12 screw size, 0.216" thread diameter, and 14 threads per inch. Features right-hand threading, fully threaded shank, and external hex drive compatible with standard tools. The drilling tip is configured as No. 3 type with 9/32" length, capable of maximum drilling thickness of 0.187". Complies with industry standards for BSD tapping screws and manufactured using 18-8 stainless steel with galvanic barrier coating for enhanced corrosion protection. Meets relevant industry specifications for thread forming fasteners in metal applications.