S-91515A210 Length 3 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, ensuring long-term durability in demanding industrial environments.
• Enhanced load distribution thanks to the wide flanged truss head design, reducing the risk of material damage and improving joint integrity.
• Efficient thread-forming installation using BSD technology, which creates strong, secure threads without pre-drilling in steel and sheet metal.
• Quick, reliable fastening with the No. 3 drilling tip, capable of penetrating up to 1/4" thickness for faster assembly and reduced labor time.
• Full-thread engagement along the 3-1/2" length, providing maximum grip and pull-out resistance in heavy-duty applications.
• Secure, slip-resistant drive with the Phillips No. 3 drive style, ensuring consistent torque application and minimizing tool cam-out.
• Environmental and regulatory compliance with RoHS 3 standards, making these screws safe for use in regulated industries and global markets.

Professional Applications & Engineering Value

Engineered for demanding steel and sheet metal applications, these zinc-plated steel tapping screws deliver exceptional performance by eliminating the need for separate tapping operations. The thread-forming BSD design creates precise, robust threads that resist loosening under vibration, while the No. 3 drilling tip efficiently penetrates materials up to 1/4" thick, reducing installation time and tool wear. The flanged truss head provides a wide bearing surface, distributing clamp load effectively to prevent sheet distortion and ensure a secure, flush finish. Ideal for HVAC, automotive, and construction assemblies, these fully threaded screws offer reliable, high-strength fastening solutions that meet rigorous industrial standards.

Specification Summary & Compliance

This 1/4"-14 x 3-1/2" tapping screw features a right-hand thread with approximately 14 threads per inch, ensuring precise fit and alignment in accordance with standard industrial practices. Manufactured from zinc-plated steel with a fully threaded, round shank and Phillips No. 3 drive, it adheres to consistent dimensional accuracy for reliable performance. The product is RoHS 3 (2015/863/EU) Compliant, confirming its suitability for environmentally conscious procurement and use in regulated sectors.