S-90096A342 1/4"-20 x 3" 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
• High-torque installation capability through external hex drive design, ensuring secure fastening and reducing tool slippage
• Self-tapping efficiency with Type F thread cutting design, eliminating the need for pre-tapped holes in materials like aluminum and cast iron
• Enhanced load distribution thanks to the integrated flange, reducing surface pressure and preventing material damage
• Reliable coarse threading (UNC 1/4"-20) providing excellent pull-out resistance in softer materials and faster installation
• Full-length threading ensures consistent grip along the entire 3" length, maximizing holding power in thick assemblies
• Broad material compatibility specifically engineered for aluminum, brass, cast iron, and sheet metal applications

Professional Applications & Engineering Value

This zinc-plated steel tapping screw delivers exceptional engineering value by solving critical fastening challenges in industrial assembly operations. The Type F thread cutting design with coarse UNC threading creates precise mating threads in ductile materials without pre-tapping, significantly reducing installation time and labor costs. The external hex drive accommodates high torque applications, preventing cam-out during installation in aluminum, brass, cast iron, and sheet metal components. The flanged design provides wider bearing surface, distributing clamp load effectively to prevent material deformation in thin-section applications. These combined features make this tapping screw ideal for production lines where reliability, speed, and consistent performance are paramount.

Specification Summary & Compliance

This 1/4"-20 tapping screw features UNC coarse threads with standard Class 2A thread tolerances for reliable engagement. Manufacturing strictly adheres to ASME B18.6.3 specifications (SAE J933) ensuring dimensional accuracy and performance consistency. The product is fully RoHS 3 (2015/863/EU) compliant for environmental safety. Designed for use with No. 2 drill bit (0.221" diameter), this fully threaded screw delivers precision fastening in various industrial materials while meeting rigorous quality standards.