S-91309A722 1/2"-13 x 2 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
• Coarse UNC threads with Class 2A fit enable quick installation and secure fastening in various materials
• External hex drive design allows for high-torque application with standard tools, reducing assembly time
• Full threading along the 2 1/2" length offers maximum grip and adjustability in deep applications
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures quality, safety, and environmental standards are met

Professional Applications & Engineering Value

This 1/2"-13 UNC hex head screw is engineered for heavy-duty industrial applications where reliability and strength are critical. The high-strength steel construction, combined with zinc plating, provides robust corrosion resistance, making it ideal for outdoor machinery, construction equipment, and manufacturing assemblies exposed to harsh conditions. The coarse thread design ensures rapid installation and secure holding power in materials like steel and cast iron, reducing the risk of stripping. With its external hex drive, it supports high torque applications, facilitating efficient maintenance and assembly processes. This fastener addresses common engineering challenges such as vibration loosening and environmental degradation, delivering long-term performance in structural and mechanical systems.

Specification Summary & Compliance

This product features a 1/2"-13 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is manufactured in accordance with ASME B18.2.1 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to industry standards for safety and environmental responsibility. The inch system measurements, including a length of 2 1/2", support consistent performance in imperial-based applications.