S-92327A294 3/8"-16 x 4" ASME B18.2.1, SAE J429 Square Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• Optimized installation efficiency with external square drive design providing maximum torque transfer and reduced cam-out
• Enhanced durability with Rockwell C25 hardness maintaining structural integrity under repeated stress
• Reliable thread engagement through coarse UNC threading and Class 2A fit ensuring consistent fastening performance
• Full-length threading for maximum grip and adjustment flexibility across the entire 4" length
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability

Professional Applications & Engineering Value

This SAE Grade 5 square head screw delivers critical engineering solutions for industrial applications where vibration resistance and structural integrity are paramount. The zinc yellow-chromate plated steel construction provides superior corrosion protection in manufacturing environments, while the external square drive enables high-torque installation without stripping. The coarse UNC threading ensures rapid assembly and reliable performance in structural steel connections, heavy machinery, and construction applications. With full threading along the 4" length, this fastener maintains consistent clamping force across extended joints, preventing loosening under dynamic loads. Engineered to meet rigorous industrial square head screw standards, it solves common challenges of fastener failure in high-stress environments.

Specification Summary & Compliance

This 3/8"-16 UNC square head screw maintains precise Unified Standard Class 2A thread fit tolerances for consistent engagement. Manufactured according to ASME B18.2.1 dimensional specifications and SAE J429 material standards, ensuring mechanical properties and interchangeability. The right-hand thread direction and coarse thread spacing provide optimal performance in industrial fastening applications. Compliant with industry standards for dimensional accuracy and material properties, suitable for various industrial and construction applications requiring medium-strength fasteners.