S-90087A544 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 industrial environments
• Efficient thread cutting action eliminates the need for pre-tapped holes, reducing installation time and labor costs
• Broad material compatibility engineered for reliable performance in aluminum, brass, cast iron, and sheet metal applications
• Optimized drive engagement with No. 3 Phillips drive for secure torque transmission and reduced cam-out risk
• Full threading design ensures maximum grip length and uniform stress distribution along the entire fastener
• Coarse UNC thread spacing provides rapid installation and superior holding power in various base materials
• Standard pan head profile offers a balanced combination of low profile design and adequate bearing surface

Professional Applications & Engineering Value

These 1/4"-20 zinc-plated steel tapping screws deliver exceptional value in industrial assembly operations where time efficiency and material compatibility are critical. The thread cutting design (Type F) creates precise mating threads in ductile materials like aluminum and brass without requiring pre-tapped holes, significantly reducing preparation time and tooling costs. The coarse UNC thread spacing ensures rapid installation while maintaining strong pull-out resistance, particularly valuable in sheet metal and cast iron applications where vibration resistance is essential. The zinc plating provides a reliable barrier against corrosion, extending service life in environments where moisture or chemical exposure might compromise fastener integrity. These fully threaded screws with Phillips drive configuration offer consistent performance across automotive, machinery, and metal fabrication sectors where ASME B18.6.3 compliance is mandatory for quality assurance.

Specification Summary & Compliance

This 1/4"-20 tapping screw features UNC coarse threads with standard Class 2A tolerances, ensuring consistent fit and performance. The fastener meets ASME B18.6.3 specifications (SAE J933) for dimensional accuracy and mechanical properties. Manufacturing complies with RoHS 3 (2015/863/EU) regulations, confirming restriction of hazardous substances. The 1 1/4" length with fully threaded design and 0.492" pan head diameter provides standardized dimensions for predictable installation and replacement across industrial applications.