S-90420A511 Length 1" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates Pre-Drilling – Self-drilling tip penetrates up to 0.14" thickness in steel, stainless steel, and sheet metal, reducing labor and tooling costs.
• Superior Corrosion Resistance – Galvanic-barrier coated 18-8 stainless steel construction prevents galvanic corrosion in harsh environments.
• High-Torque Fastening – External hex drive allows for secure installation with standard tools, minimizing stripping and ensuring reliable connections.
• Optimized Thread Engagement – Fully threaded No. 12-14 thread forming design provides consistent clamping force and vibration resistance.
• Enhanced Load Distribution – Integrated flange spreads pressure evenly, reducing material stress and improving joint integrity.
• Broad Material Compatibility – Specifically engineered for use in steel, stainless steel, and sheet metal applications without compromising performance.
• Streamlined Assembly – Right-hand thread and No. 2 drill tip enable quick, efficient installation in high-volume production settings.

Professional Applications & Engineering Value

This thread forming tapping screw is engineered to solve critical challenges in metal fabrication and assembly. The galvanic-barrier coated 18-8 stainless steel material eliminates the risk of galvanic corrosion when fastening dissimilar metals, extending service life in outdoor or chemically exposed environments. Its self-drilling tip (No. 2 type, 1/4" length) allows direct penetration into steel, stainless steel, and sheet metal up to 0.14" thick, removing the need for separate drilling operations and reducing assembly time by up to 50%. The external hex drive and fully threaded BSD design ensure high torque transmission and uniform stress distribution, preventing loosening under dynamic loads. Ideal for HVAC systems, electrical enclosures, and automotive panels, this screw delivers reliable performance where vibration resistance and corrosion protection are non-negotiable.

Specification Summary & Compliance

This No. 12-14 thread forming tapping screw adheres to BSD standards with a right-hand thread and Class 2A inch-system tolerances for precise fit. The fully threaded 1" length, 0.216" diameter, and 14 TPI configuration ensure consistent engagement. Manufactured from RoHS and REACH-compliant 18-8 stainless steel with a galvanic-barrier coating, it meets industry requirements for corrosion resistance and environmental safety. The external hex drive (0.313" width) and flanged design (0.415" diameter) align with ASME fastening specifications, providing reliable performance in steel and sheet metal applications.