S-91274A516 1/2"-13 x 7" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength: Withstands up to 170,000 psi, providing reliable performance in high-stress applications and reducing the risk of fastener failure.
• Superior Corrosion Resistance: Zinc-flake coating offers robust protection against harsh environments, extending service life and minimizing maintenance needs.
• Precise Thread Fit: Class 3A thread ensures tight, secure fastening with minimal play, enhancing assembly accuracy and vibration resistance.
• Optimized Drive Engagement: 3/8" hex drive and standard socket head profile allow for high torque application and easy installation in confined spaces.
• Durable Material Construction: Made from alloy steel with Rockwell C37 hardness, delivering excellent wear resistance and long-term durability.
• Versatile Partially Threaded Design: Combines strong grip in threaded sections with smooth shank for precise clamping and alignment in various assemblies.
• Broad Industrial Compliance: Meets ASME B18.3, ASTM A574, and ASTM B117 standards, ensuring consistent quality and reliability for professional use.

Professional Applications & Engineering Value

This 1/2"-13 UNC Socket Head Cap Screw is engineered to address critical challenges in heavy-duty industrial settings. The zinc-flake-coated alloy steel construction provides superior corrosion resistance, making it ideal for machinery, automotive, and construction applications exposed to moisture or chemicals. Its Class 3A thread fit and coarse thread design ensure secure fastening even under high vibration, reducing loosening and maintenance downtime. The partially threaded rod allows for precise clamping force distribution, while the 3/8" hex drive facilitates easy installation with standard tools. These features collectively enhance assembly efficiency, mechanical integrity, and longevity in demanding environments.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC coarse thread with Class 3A thread fit for high precision, a length of 7", and a minimum thread length of 1 1/2". It complies with ASME B18.3, ASTM A574, and ASTM B117 specifications, ensuring adherence to rigorous manufacturing standards. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global industrial use.