S-90096A540 1/4"-20 x 3/4" ASME B18.6.3, SAE J933 Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments.
• Efficient self-tapping installation with thread cutting design, eliminating the need for pre-tapped holes and reducing assembly time.
• Enhanced load distribution from the integrated flange, providing a larger bearing surface and reducing material stress.
• Versatile material compatibility for use in aluminum, brass, cast iron, and sheet metal, streamlining inventory for various applications.
• Reliable fastening performance with UNC coarse threads, ensuring strong holding power and resistance to vibration loosening.
• Dual-drive convenience featuring an external hex/slotted head for flexible tool use and easy installation in confined spaces.
• Assured quality and compliance meeting ASME B18.6.3 standards and RoHS 3 regulations for safe, reliable industrial use.

Professional Applications & Engineering Value

This 1/4-20 zinc-plated steel flanged hex tapping screw is engineered to solve common fastening challenges in metal assemblies. Its thread cutting capability allows it to form its own threads in aluminum, brass, cast iron, and sheet metal, eliminating the cost and time associated with tapping operations. The UNC coarse thread spacing provides rapid installation and high resistance to vibrational loosening, making it ideal for heavy-duty industrial applications. The flanged design distributes clamp load over a wider area, preventing pull-through in softer materials and enhancing joint integrity. Combined with a zinc-plated finish for corrosion resistance, this screw ensures long-term reliability in harsh environments, from machinery to structural metal frameworks.

Specification Summary & Compliance

This screw features a 1/4"-20 UNC coarse thread with a thread diameter of 0.25" and is fully threaded for maximum grip. It is designed for use with a No. 2 drill bit (0.221" diameter). Manufactured to meet ASME B18.6.3 specifications (SAE J933), ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant, confirming it is free from hazardous substances and suitable for global industrial use.