S-90096A337 1/4"-20 x 1 1/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Efficient thread-cutting capability with Type F tapping design eliminates need for pre-tapped holes in aluminum, brass, cast iron and sheet metal
• Maximum torque transmission through external hex drive design prevents stripping during high-torque installation
• Enhanced stability and load distribution with integrated flange design reduces the risk of material deformation
• Reliable coarse thread engagement with UNC 1/4"-20 threading ensures secure fastening in various materials
• Full-length threading provides consistent holding power along the entire 1 1/4" length for maximum connection strength
• Precision compatibility with No. 2 drill bit (0.221" diameter) ensures proper fit and optimal thread formation

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional thread-cutting performance in challenging materials including aluminum, brass, cast iron, and sheet metal. The Type F tapping screw design with UNC coarse threads creates precise mating threads during installation, eliminating the time and cost associated with pre-tapped holes. The external hex drive combined with the flanged head provides superior torque resistance and prevents pull-through in softer materials. Engineered for industrial fastening applications, these fully threaded screws maintain consistent clamping force while the zinc plating offers reliable protection against environmental corrosion, making them ideal for heavy-duty assembly operations where durability and installation efficiency are critical.

Specification Summary & Compliance

This 1/4"-20 tapping screw features UNC coarse threads with right-hand direction and blunt tip design. Manufactured to precise ASME B18.6.3 specifications SAE J933, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) compliant, meeting international environmental standards. With a length of 1 1/4" and flange diameter of 0.52", these screws are designed for use with No. 2 drill bits (0.221" diameter) to achieve optimal thread engagement in various metal substrates.