S-90096A331 1/4"-20 x 3/8" 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
• Excellent thread-cutting performance in multiple materials including aluminum, brass, cast iron, and sheet metal without pre-tapping
• Enhanced driving efficiency with external hex drive and flange design that eliminates the need for separate washers
• Maximum holding power through fully threaded design with UNC coarse threads for superior pull-out resistance
• Reliable industrial compliance meeting ASME B18.6.3 specifications and RoHS 3 environmental standards
• Optimized installation with Type F thread cutting design that creates precise mating threads in base materials
• Secure flange seating with 0.52" diameter providing increased bearing surface and vibration resistance

Professional Applications & Engineering Value

These zinc-plated steel hex flange tapping screws deliver exceptional thread-cutting performance in challenging applications where traditional fasteners fail. The Type F thread cutting design with UNC coarse threads enables reliable installation in aluminum, brass, cast iron, and sheet metal without pre-tapped holes, significantly reducing assembly time and labor costs. The external hex drive combined with the integrated flange head provides superior torque transmission and eliminates washer requirements, while the zinc plating offers essential corrosion protection for extended service life in industrial environments. These tapping screws are engineered to maintain consistent clamping force and resist vibration loosening in demanding mechanical assemblies.

Specification Summary & Compliance

This 1/4"-20 thread cutting screw features UNC coarse thread spacing with Class 2A thread tolerances and full threading along the 3/8" length. The fastener meets ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance standards. Compliance with RoHS 3 (2015/863/EU) ensures environmental responsibility, while the Type F thread cutting design is optimized for use with No. 2 drill bit (0.221" diameter) in various metal applications. The zinc-plated steel construction provides both corrosion resistance and mechanical strength for industrial fastening requirements.