S-90064A739 Length 3 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Eliminates pre-drilling requirements with integrated No. 3 drill tip that penetrates up to 0.175" thick steel and sheet metal, reducing labor time and tooling costs
• Superior corrosion resistance through zinc-plated steel construction, ensuring long-term reliability in demanding industrial environments
• Enhanced driving efficiency with external hex head design providing secure tool engagement and high torque transmission during installation
• Increased joint stability through thread forming (BSD) technology that creates stronger, vibration-resistant connections in metal substrates
• Improved load distribution with integrated flange design that eliminates the need for separate washers and spreads clamping force evenly
• Maximum thread engagement with fully threaded 3-1/2" length, delivering consistent holding power throughout the entire fastener length
• Streamlined inventory management with standardized No. 10-16 right-hand thread configuration that ensures compatibility across industrial applications

Professional Applications & Engineering Value

These zinc-plated steel flanged hex head tapping screws are engineered specifically for challenging sheet metal and steel assembly applications where drilling and tapping operations must be combined into a single efficient process. The thread forming BSD design creates precise, durable threads in parent material without generating chips, eliminating contamination risks in sensitive electrical or HVAC systems. The No. 3 drill tip with 1/4" length provides exceptional penetration capability through materials up to 0.175" thick, while the external hex drive ensures reliable installation even in high-vibration environments. This combination of features makes these tapping screws ideal for construction, industrial machinery, metal fabrication, and automotive applications where structural integrity and installation efficiency are critical.

Specification Summary & Compliance

Manufactured to precise inch system specifications with No. 10-16 thread size (approximately 16 threads per inch) and 3-1/2" fully threaded length. Features standard right-hand threading with Class 2A tolerance for consistent performance. The thread forming tapping method (BSD type) complies with industrial fastening standards for metal applications. Zinc-plated surface treatment provides corrosion protection while maintaining RoHS and REACH compliance for environmental safety. External hex drive (0.313" head width) ensures compatibility with standard industrial tools and meets ASME/ANSI specifications for hex head fasteners.