S-92327A114 5/16"-18 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 high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating that protects against rust in harsh industrial environments
• Optimized torque transmission with external square drive design that prevents tool slippage during installation
• Enhanced thread engagement through UNC coarse threading that provides faster assembly and better performance in softer materials
• Consistent mechanical properties with Rockwell C25 hardness ensuring dimensional stability under heavy loads
• Full-length threading offering maximum grip and adjustability across the entire 4-inch 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 exceptional engineering value for industrial applications requiring medium to high strength fastening solutions. The zinc yellow-chromate plated steel construction provides superior corrosion protection, making it ideal for outdoor equipment, machinery assemblies, and structural applications exposed to environmental elements. The external square drive design ensures maximum torque transmission without cam-out, while the UNC coarse thread pattern facilitates quick assembly and reliable performance in wood, soft metals, and composite materials. With fully threaded construction and Class 3A thread fit, this fastener maintains consistent clamping force across its entire 4-inch length, solving common challenges of vibration loosening and material fatigue in demanding industrial settings.

Specification Summary & Compliance

This square head screw features precision 5/16"-18 UNC coarse threads with Unified Standard Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured from high-quality steel with Rockwell C25 hardness and 120,000 psi tensile strength, the fastener meets SAE Grade 5 mechanical requirements. Compliance with ASME B18.2.1 and SAE J429 specifications ensures consistent quality and performance across industrial applications. The zinc yellow-chromate plating provides RoHS and REACH compliant corrosion protection for extended service life in challenging environments.