S-91236A657 3/8"-16 x 11" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc plating for extended service life in demanding environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and stress
• Rockwell B69 hardness provides superior durability and resistance to wear
• Coarse UNC thread enables faster installation and reduced cross-threading risks
• External hex drive design allows for high-torque application with standard tools
• Class 2A thread fit guarantees consistent, precision threading for secure fastening
• Partial threading offers optimal grip and clamping force for specific assembly requirements

Professional Applications & Engineering Value

This 3/8"-16 UNC hex head screw is engineered for heavy-duty industrial applications where structural integrity is critical. Manufactured from ASTM A307 steel and featuring a zinc-plated finish, it effectively combats corrosion in harsh environments, reducing maintenance frequency. The coarse thread design ensures quick, secure fastening in materials like steel and cast iron, while the external hex drive accommodates high-torque tools for efficient assembly in construction, machinery, and infrastructure projects. Its partial threading provides precise clamping control, making it ideal for applications requiring vibration resistance and long-term reliability.

Specification Summary & Compliance

This screw adheres to Class 2A thread fit tolerances per UNC standards, ensuring dimensional accuracy. It meets ASME B18.2.1 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material quality for industrial use.