S-91274A456 1/2"-13 x 1 3/4" ASME B18.3, ASTM A574, ASTM B117 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 PSI ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Superior corrosion resistance provided by the zinc-flake coating, extending service life and maintaining integrity in harsh or outdoor environments.
• Precise Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing loosening and ensuring long-term assembly stability.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity and drive features through repeated use and high torque.
• Fully threaded design allows for maximum grip and adjustability along the entire length, providing versatile fastening solutions for various material thicknesses.
• Hex socket drive enables easy installation and removal in confined spaces, improving assembly efficiency and reducing tool slip.
• Compliance with major industry standards including ASME B18.3 and ASTM A574, ensuring consistent quality, interchangeability, and reliability in professional applications.

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 robust protection against corrosion and chemical exposure, making it ideal for machinery, automotive assemblies, and structural frameworks exposed to demanding conditions. The coarse UNC thread and Class 3A fit ensure rapid installation and high clamping force, reducing assembly time while preventing vibration-induced loosening. With a fully threaded body and hex drive, it offers superior load distribution and accessibility in tight spaces, enhancing maintenance efficiency. These features collectively deliver reliable performance in applications requiring high strength, durability, and compliance with stringent engineering standards.

Specification Summary & Compliance

This socket head cap screw features a 1/2"-13 UNC thread with Class 3A fit for precise dimensional accuracy and secure fastening. Manufactured in accordance with ASME B18.3 and ASTM A574 specifications, it guarantees consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and international markets.