S-92620A636 3/8"-16 x 3" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion protection through zinc yellow-chromate plating that extends service life in harsh environments
• Optimized installation efficiency with external hex drive design providing secure tool engagement and torque transmission
• Consistent thread engagement with Class 2A thread fit ensuring precise assembly and vibration resistance
• Maximum fastening strength through Grade 8 classification and Rockwell C33 hardness for heavy-duty applications
• Enhanced material compatibility with 3/8"-16 UNC coarse threads that resist loosening under dynamic loads
• Full-length threading for uniform stress distribution and versatile positioning in assembled components

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The zinc yellow-chromate plated steel construction provides superior protection against environmental degradation, making them ideal for outdoor equipment, automotive assemblies, and industrial machinery exposed to moisture and chemicals. The 3/8"-16 UNC coarse thread configuration ensures rapid installation and maintains clamping force in high-vibration environments, while the external hex drive accommodates standard tools for efficient maintenance and assembly operations. Engineered to withstand extreme mechanical stresses, these fully threaded fasteners distribute load evenly across the entire shank, preventing stress concentration points that could lead to premature failure in structural applications.

Specification Summary & Compliance

Manufactured to exacting dimensional standards with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 and SAE J429 specifications for hex head screws. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Features 3/8"-16 UNC coarse threads with precise thread spacing and diameter control for reliable mating with corresponding nuts and tapped holes in industrial assemblies.