S-91274A185 5/8"-11 x 1 1/2" 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 in high-stress applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the zinc-flake coating extends service life in harsh industrial environments, minimizing maintenance needs.
• Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
• Fully threaded design allows for maximum grip and adjustability across the entire length, simplifying installation in various materials.
• Compliance with ASME B18.3 and ASTM A574 guarantees consistent quality and interchangeability, ensuring compatibility with standard tools and components.
• RoHS 3 and REACH compliance meets environmental regulations, making it suitable for global supply chains and sensitive applications.

Professional Applications & Engineering Value

This 5/8"-11 UNC Socket Head Cap Screw is engineered for demanding industrial settings where reliability is critical. The zinc-flake-coated alloy steel construction provides robust protection against corrosion and chemical exposure, ideal for machinery, automotive assemblies, and structural frameworks. Its coarse thread design ensures quick installation and high resistance to loosening under vibration, while the 1/2" hex drive allows for high torque application without stripping. The fully threaded body offers uniform clamping force, making it perfect for securing heavy components in construction, manufacturing, and aerospace applications where high tensile strength and durability are paramount.

Specification Summary & Compliance

This screw features a Class 3A thread fit for precise engagement, with UNC coarse threads and right-hand direction. Dimensions include a 1-1/2" length, 15/16" head diameter, and 5/8"-11 thread size. It conforms to ASME B18.3 and ASTM A574 specifications, ensuring dimensional accuracy and mechanical properties. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use.