S-90420A330 Length 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 self-drilling installation with integrated steel tip that eliminates pre-drilling in steel, stainless steel, and sheet metal up to 0.098" thickness
• Enhanced thread-forming capability with BSD tapping screw design creates strong, permanent threads in base materials
• Secure flange design provides wider bearing surface for improved load distribution and vibration resistance
• External hex drive compatibility allows for high-torque installation using standard industrial tools
• Full threading ensures maximum grip length and holding power across the entire fastener length
• Regulatory compliance meets RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

These flanged hex head tapping screws deliver exceptional value in metal fabrication and assembly operations where corrosion resistance and installation efficiency are critical. The galvanic-barrier coated 18-8 stainless steel construction prevents galvanic corrosion when joining dissimilar metals, while the integrated drilling tip eliminates secondary drilling operations, significantly reducing assembly time and labor costs. The thread-forming BSD design creates precise, strong threads in steel, stainless steel, and sheet metal applications without chip formation, making them ideal for electrical enclosures, HVAC systems, and automotive components where vibration resistance and long-term reliability are essential.

Specification Summary & Compliance

This No. 8-18 x 1/2" tapping screw features precision right-hand threads with 18 threads per inch and 0.164" thread diameter, manufactured to BSD tapping screw standards for consistent performance. The external hex drive (1/4" head width) and flanged design (0.348" diameter) ensure secure installation and optimal clamping force. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest industrial safety and environmental standards for professional use.