S-90628A647 Length 3" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with specialized coating extends service life in harsh industrial environments
• Integrated steel/rubber sealing washer creates reliable moisture and dust barriers in assembled components
• Self-drilling tip design eliminates pre-drilling requirements, reducing installation time and labor costs
• Thread forming BSD technology creates stronger, more secure threads in steel and sheet metal substrates
• External hex drive with 3/8" head provides high torque capability and secure tool engagement
• Full 3" threading ensures maximum grip length and load distribution across the entire fastener
• 0.21" maximum drilling capacity handles standard gauge steel and sheet metal applications efficiently

Professional Applications & Engineering Value

Engineered for demanding steel and sheet metal applications, this corrosion-resistant coated steel tapping screw delivers exceptional performance where durability matters most. The thread forming BSD design creates precise, secure mating threads without chip formation, preventing contamination in sensitive assemblies. The integrated steel/rubber sealing washer provides critical environmental protection against moisture ingress, while the self-drilling No. 3 tip with 5/16" length streamlines installation in fabrication shops and production lines. This 1/4"-14 fully threaded fastener combines the reliability of external hex drive with advanced drilling capabilities, making it ideal for HVAC systems, electrical enclosures, structural frameworks, and industrial equipment manufacturing where vibration resistance and long-term performance are paramount.

Specification Summary & Compliance

This heavy-duty tapping screw features precision 1/4"-14 thread with right-hand direction and fully threaded 3" length. Manufactured to BSD tapping screw standards with thread forming technology, it ensures consistent performance in steel and sheet metal substrates. The fastener maintains RoHS 3 (2015/863/EU) compliance for environmental safety and meets industrial specifications for corrosion-resistant coated steel construction with integrated flat washer (5/8" OD) featuring steel/rubber composition. The drilling tip (No. 3 type) provides reliable penetration up to 0.21" maximum thickness without pilot holes.