S-90002A117 3/8"-16 x 1 3/4" ASME B18.2.1, SAE J429 High-Strength Steel Hex Head Screws with Material Certification

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 150,000 PSI tensile strength for reliable performance in high-stress applications
• Superior corrosion resistance through zinc yellow-chromate plating, extending service life in harsh environments
• Optimized hardness and durability with Rockwell C33 rating to prevent stripping and maintain structural integrity
• Precise thread engagement with Class 2A UNC coarse threads ensuring secure fastening and easy installation
• Maximum thread coverage through full threading for consistent clamping force along the entire fastener length
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
• Enhanced torque application with external hex drive design allowing for high tightening forces without slippage

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical performance where structural integrity is non-negotiable. The combination of 150,000 PSI tensile strength and Rockwell C33 hardness addresses common failure points in heavy machinery, construction frameworks, and industrial equipment where vibration and dynamic loads compromise fastener integrity. The zinc yellow-chromate plating provides essential corrosion protection in manufacturing facilities, outdoor installations, and high-moisture environments. The UNC coarse thread pattern ensures rapid installation and reliable performance in structural steel connections, equipment mounting, and assembly lines where time efficiency and joint security are paramount. These fully threaded fasteners maintain consistent clamping force across the entire 1-3/4" length, preventing joint loosening under thermal cycling and mechanical stress.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerances ensuring proper engagement and interchangeability. The 3/8"-16 UNC coarse thread specification provides optimal performance in industrial applications. Complies with ASME B18.2.1 and SAE J429 standards for dimensional accuracy and mechanical properties. The external hex drive configuration (9/16" head width, 15/64" head height) enables high-torque installation with standard tools. Meets industry requirements for heavy-duty fastening applications with verified material and performance specifications.