S-90002A120 3/8"-16 x 3" 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 provided by zinc yellow-chromate plating, extending service life in harsh environments
• Optimized thread engagement through UNC coarse threads and Class 2A fit, ensuring secure fastening and vibration resistance
• Enhanced installation efficiency with external hex drive design, allowing for high torque application and quick assembly
• Precise length control with partial threading on the 3" shaft, preventing thread damage and improving joint integrity
• Industry-standard compliance meeting ASME B18.2.1 and SAE J429 specifications for guaranteed quality and interchangeability
• Maximum durability achieved through Rockwell C33 hardness, maintaining structural integrity under repeated stress

Professional Applications & Engineering Value

These Grade 8 hex head screws deliver critical engineering solutions for industrial applications where failure is not an option. The steel construction combined with 150,000 PSI tensile strength makes them ideal for heavy machinery, structural assemblies, and equipment requiring high-strength fasteners. The zinc yellow-chromate plating provides essential corrosion protection in manufacturing environments exposed to moisture and chemicals. With 3/8"-16 UNC coarse threads and partial threading, these screws offer superior resistance to vibration loosening while maintaining precise clamp load distribution. The external hex drive design enables efficient installation in confined spaces, making them perfect for maintenance, construction, and automotive applications where reliability and quick assembly are paramount.

Specification Summary & Compliance

This heavy-duty hex head screw features precise Class 2A thread fit with 3/8"-16 UNC coarse threads and maintains dimensional accuracy per ASME B18.2.1 specifications. The fastener complies with SAE J429 Grade 8 standards, ensuring consistent mechanical properties including Rockwell C33 hardness and 150,000 PSI tensile strength. Manufacturing follows industrial quality protocols with zinc yellow-chromate plating for corrosion protection, making these screws suitable for demanding applications requiring verified performance and regulatory compliance.