S-91286A625 3/8"-16 x 7/8" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum load-bearing capacity with 150,000 psi tensile strength for critical structural applications
• Superior corrosion protection through zinc-flake coating, extending service life in harsh environments
• Enhanced durability with Rockwell C33 hardness to resist wear and deformation under heavy loads
• Reliable thread engagement with Class 2A thread fit ensuring consistent installation and vibration resistance
• Optimized for industrial use featuring coarse UNC threads for faster assembly and reduced cross-threading risk
• Full-thread design providing maximum grip length and uniform stress distribution
• External hex drive compatibility with standard tools for efficient installation and removal

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 hex head screws deliver exceptional performance where failure is not an option. The zinc-flake coated steel construction provides superior corrosion resistance in demanding environments, while the 3/8"-16 UNC coarse thread configuration ensures rapid installation and reliable clamping force. With 150,000 psi tensile strength and Rockwell C33 hardness, these fully threaded screws maintain structural integrity under extreme vibration and dynamic loads, making them ideal for machinery, construction equipment, and automotive assemblies where high-strength fastening solutions are critical for operational safety and longevity.

Specification Summary & Compliance

Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading for optimal performance. Complies with ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring dimensional accuracy and mechanical properties. Meets environmental standards including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations for safe use in industrial applications worldwide.