S-90821A380 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanic barrier coated 18-8 stainless steel, ensuring long-term reliability in harsh environments.
• Efficient installation and high pull-out strength thanks to the thread forming (BSD) design, creating strong, permanent threads in aluminum and sheet metal without pre-drilling.
• Enhanced material penetration with a No. 3 drilling tip, capable of drilling through materials up to 0.187" thick for faster assembly.
• Increased clamping force and stability from the integrated flange, which acts as a built-in washer to distribute load and prevent loosening.
• Secure, high-torque driving with an external hex head, allowing for powerful installation with standard tools and reducing the risk of stripping.
• Full-length threading provides consistent grip along the entire 1-1/4" length, maximizing holding power in various material thicknesses.
• Precision 14 TPI threading ensures a tight, secure fit and reliable performance in demanding applications.

Professional Applications & Engineering Value

This No. 12 thread forming screw is engineered to solve common fastening challenges in aluminum and sheet metal assemblies. The galvanic barrier coated 18-8 stainless steel construction provides exceptional corrosion resistance, crucial for outdoor or corrosive environments, while the thread forming (BSD) design eliminates the need for tapped holes, reducing labor and potential for cross-threading. The integrated drilling tip (No. 3 type, 9/32" long) allows for self-drilling into materials up to 0.187" thick, streamlining the installation process and minimizing tool changes. Combined with a flanged hex head for superior clamp-up and an external hex drive for high torque application, this screw delivers reliable, vibration-resistant connections in HVAC, automotive, and electronic enclosure applications, enhancing assembly speed and long-term joint integrity.

Specification Summary & Compliance

This screw conforms to BSD standards for thread forming tapping screws. Key dimensional specifications include a No. 12 screw size, 0.216" thread diameter, 14 TPI thread pitch, 1-1/4" length, and a 0.432" flange diameter. The fully threaded shank and right-hand thread direction ensure consistent performance. Manufactured from 18-8 stainless steel with a galvanic barrier coating, it is designed to meet industry demands for durability and is compliant with RoHS and REACH environmental standards.