S-90096A544 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 for extended service life in demanding environments
• Enhanced installation efficiency through UNC coarse threading that reduces cross-threading risks and speeds assembly
• Increased stability and load distribution thanks to the integrated flange design that eliminates the need for separate washers
• Versatile material compatibility with thread-cutting tip designed for aluminum, brass, cast iron, and sheet metal applications
• Flexible drive options with combined external hex/slotted head for both power and manual tool compatibility
• Full-length threading ensures maximum grip strength and consistent holding power along the entire fastener length
• Reliable industrial performance backed by ASME B18.6.3 compliance and RoHS 3 environmental standards

Professional Applications & Engineering Value

This heavy-duty flanged hex tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength for demanding applications. The thread-cutting F-type design with blunt tip creates precise mating threads in aluminum, brass, cast iron, and sheet metal without pre-tapping, significantly reducing installation time and labor costs. The combination of UNC coarse threading and external hex/slotted drive ensures quick, secure fastening even in high-vibration environments. The integrated flange eliminates washer requirements while providing superior clamping force distribution, making these tapping screws ideal for automotive, machinery, and structural applications where reliability and speed of assembly are critical.

Specification Summary & Compliance

This 1/4"-20 flanged hex tapping screw features precision UNC coarse threading with Class 2A tolerance standards for consistent fit and performance. The fastener meets ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and mechanical properties. Manufacturing compliance includes RoHS 3 (2015/863/EU) regulations for environmental safety. Critical dimensions include 1-1/4" length, 3/8" hex head width, and 0.52" flange diameter, engineered for optimal performance with No. 2 drill bit (0.221" diameter) in specified materials.