S-90096A341 1/4"-20 x 2 1/2" 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
• Effortless installation through Type F thread cutting design that creates mating threads without pre-tapping in aluminum, brass, cast iron, and sheet metal
• High-torque capability with external hex drive and flanged head design that eliminates separate washers while providing superior clamping force
• Reliable thread engagement with UNC coarse threading and full threading along the 2 1/2" length for maximum holding power
• Precision compatibility with No. 2 drill bit (0.221" diameter) for optimal hole preparation and secure fastening
• Reduced assembly time through integrated flange that distributes load evenly and prevents pull-through in thin materials
• Industry compliance assurance meeting ASME B18.6.3 specifications and RoHS 3 environmental standards

Professional Applications & Engineering Value

This heavy-duty hex flange tapping screw delivers exceptional engineering value by solving critical fastening challenges in metal fabrication and assembly operations. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength for demanding applications. The Type F thread cutting design with UNC coarse threading eliminates the need for separate tapping operations, significantly reducing installation time and labor costs in aluminum, brass, cast iron, and sheet metal assemblies. The integrated flange distributes clamping force over a wider surface area (0.52" diameter), preventing material distortion and ensuring vibration-resistant connections. The external hex drive accommodates standard tools for high-torque installation, making it ideal for production environments where speed and reliability are paramount.

Specification Summary & Compliance

This 1/4"-20 hex flange tapping screw features precision UNC coarse threads with standard Class 2A thread tolerances for consistent performance. The 2 1/2" length and fully threaded design ensure maximum engagement in various material thicknesses. Manufactured to exacting ASME B18.6.3 specifications SAE J933, guaranteeing dimensional accuracy and mechanical properties. Compliant with RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use in industrial applications worldwide. The screw is engineered for use with No. 2 drill bit (0.221" diameter) for proper hole preparation in designated materials.