S-90390A135 3/8"-16 x 3" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel coating, extending service life in demanding industrial environments.
• High-torque installation capability thanks to the T40 Torx drive, reducing cam-out and tool wear for efficient assembly.
• Excellent thread-cutting performance in various materials including aluminum, brass, cast iron, and sheet metal without pre-tapping.
• Secure flush-mounting with a standard flat head and 82° countersink angle, ensuring a clean, professional finish.
• Reliable coarse UNC threading (3/8"-16) for quick installation and strong holding power in softer substrates.
• Full-length threading along the 3-inch length provides consistent grip and load distribution across the entire fastener.
• Durable blunt tip design prevents damage to materials during installation while maintaining precise thread engagement.

Professional Applications & Engineering Value

These heavy-duty tapping screws are engineered to solve common assembly challenges in metalworking and fabrication. The black-phosphate steel construction offers enhanced corrosion protection, crucial for applications in humid or outdoor settings. The Type F thread-cutting design and UNC coarse thread enable self-tapping in aluminum, brass, cast iron, and sheet metal, eliminating the need for separate tapping operations and reducing labor costs. The T40 Torx drive ensures high torque transfer without slippage, minimizing installation errors and improving workplace safety. With a standard flat head and 82° countersink, these screws sit flush for aerodynamic or aesthetic surfaces, making them ideal for automotive, HVAC, and machinery assemblies where precision and durability are paramount.

Specification Summary & Compliance

This product adheres to UNC coarse thread standards (3/8"-16) with standard dimensional tolerances. The Type F tapping screw is manufactured for thread-cutting applications, compatible with a T-size drill bit (0.358" diameter). The black-phosphate surface treatment meets industry requirements for corrosion resistance. Materials and processes comply with RoHS and REACH environmental directives, ensuring safe and sustainable use in global industrial supply chains.