S-90087A893 5/16"-18 x 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 harsh industrial environments
• Effortless installation through self-tapping thread cutting design that eliminates the need for pre-tapped holes
• Enhanced driving efficiency with Phillips No. 4 drive system providing secure torque transmission and reduced cam-out
• Reliable fastening performance in multiple materials including aluminum, brass, cast iron, and sheet metal applications
• Optimized thread engagement with UNC coarse threading ensuring strong holding power and vibration resistance
• Full-length threading for maximum grip strength and consistent fastening along the entire screw length
• Industry-standard compliance meeting ASME B18.6.3 specifications for guaranteed quality and interchangeability

Professional Applications & Engineering Value

These 5/16"-18 thread cutting screws deliver exceptional engineering value by solving critical fastening challenges in aluminum, brass, cast iron, and sheet metal applications. The zinc-plated steel construction provides essential corrosion protection while maintaining high tensile strength. The Type F tapping screw design with UNC coarse threading creates precise mating threads in parent materials, eliminating costly pre-tapping operations and reducing assembly time. The Phillips drive system ensures efficient power transmission during installation, while the fully threaded configuration maximizes pull-out resistance. These industrial fasteners are engineered to withstand vibration and maintain clamp load in demanding environments, making them ideal for heavy-duty manufacturing, automotive, and metal fabrication applications where reliability is paramount.

Specification Summary & Compliance

These thread cutting screws feature precise 5/16"-18 UNC coarse thread with Class 2A tolerance for consistent fit and performance. The 1/2" length and 0.313" thread diameter provide optimal fastening dimensions for various material thicknesses. Manufactured in compliance with ASME B18.6.3 standards and SAE J933 specifications, these screws ensure dimensional accuracy and mechanical properties for industrial applications. The zinc plating surface treatment offers enhanced corrosion protection while maintaining RoHS and REACH compliance for environmental safety.