S-90087A540 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-plated steel construction for extended service life in demanding environments
• Excellent thread-cutting performance in various materials including aluminum, brass, cast iron, and sheet metal without pre-tapping
• Reliable fastening power with coarse UNC 1/4"-20 threads that provide strong holding capability in softer materials
• Easy installation with Phillips No. 3 drive that offers good torque transfer and prevents cam-out during assembly
• Full-thread engagement along the entire 3/4" length ensures maximum pull-out resistance and vibration resistance
• Standard pan head design provides a balanced profile for secure fastening with adequate bearing surface
• Industry compliance assurance meeting ASME B18.6.3 specifications and RoHS 3 environmental standards

Professional Applications & Engineering Value

These zinc-plated steel tapping screws deliver exceptional engineering value by solving critical fastening challenges in metal fabrication and assembly operations. The Type F thread cutting design with coarse UNC threads eliminates the need for separate tapping operations, significantly reducing installation time and labor costs. The Phillips drive system ensures efficient power transfer during installation in aluminum, brass, cast iron, and sheet metal applications. The combination of zinc plating and steel construction provides optimal corrosion resistance while maintaining the strength required for industrial environments. These fully threaded screws create their own mating threads, ensuring secure fastening in materials where traditional screws might strip or loosen under vibration.

Specification Summary & Compliance

This 1/4"-20 tapping screw features precise UNC coarse threads with standard thread tolerances, 3/4" length, and pan head design with 0.492" head diameter. The product strictly complies with ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and performance standards. Environmental compliance includes RoHS 3 (2015/863/EU) compliance, ensuring safe use in regulated applications. The screw is designed for use with No. 1 drill bit (0.228" diameter) and features right-hand thread direction with fully threaded construction for maximum fastening efficiency.