S-90096A587 5/16"-18 x 1 1/2" 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
• High-strength thread cutting action creates precise mating threads in aluminum, brass, cast iron and sheet metal without pre-tapping
• Enhanced load distribution through integrated flange design eliminates need for separate washers and reduces assembly components
• Optimized installation efficiency with external hex drive providing secure tool engagement and high torque transmission
• Reliable fastening performance with UNC coarse thread profile ensuring vibration resistance and superior holding power
• Full-length threading maximizes grip length and pull-out resistance across the entire fastener engagement area
• Precision manufacturing compliance with ASME B18.6.3 standards guarantees consistent dimensional accuracy and mechanical properties

Professional Applications & Engineering Value

This zinc-plated steel hex flange tapping screw delivers exceptional engineering value in metal fabrication and assembly operations. The Type F thread cutting design with blunt tip and coarse UNC threading enables direct installation into aluminum, brass, cast iron, and sheet metal substrates without pre-tapped holes, significantly reducing labor time and assembly costs. The integrated flange head provides superior bearing surface distribution, preventing material distortion in thin-gauge applications while the external hex drive ensures reliable torque transmission during high-volume production runs. Engineered for heavy-duty industrial fastening, this screw maintains consistent performance across temperature variations and mechanical stress conditions common in automotive, machinery, and structural applications.

Specification Summary & Compliance

This 5/16"-18 thread cutting screw features UNC coarse thread profile with standard Class 2A thread tolerances and full threading along the 1½" length. Manufactured from zinc-plated steel with hex flange head (0.285" height × 1/2" width) and 0.676" flange diameter. Compliant with ASME B18.6.3 mechanical and dimensional specifications where identified under SAE J933 requirements. Recommended for use with K-size drill bit (0.281" diameter) for optimal thread engagement in specified materials.