S-91251A641 1 1/2"-12 x 4 1/2" ASTM A574 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.
• Black-oxide coating on alloy steel provides corrosion resistance and a durable finish, extending service life in harsh industrial environments.
• Fine UNRF thread with Class 2A fit offers precise engagement and vibration resistance, maintaining secure connections under dynamic loads.
• Fully threaded design allows for consistent clamping force along the entire length, ideal for adjustable and deep-set applications.
• Hex socket drive enables high-torque installation with standard tools, facilitating quick assembly and disassembly in confined spaces.
• Compliance with ASTM A574 guarantees material quality and manufacturing consistency, ensuring interchangeability and reliability.
• RoHS 3 and REACH compliance meets environmental regulations, making these screws suitable for global supply chains and eco-conscious projects.

Professional Applications & Engineering Value

This 1 1/2"-12 UNRF socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery assembly, automotive systems, and construction equipment. The black-oxide alloy steel construction, combined with a Rockwell C37 hardness rating, provides superior resistance to wear and environmental degradation, minimizing maintenance needs. The fine thread design enhances grip in materials prone to stripping, while the fully threaded rod ensures uniform stress distribution, preventing loosening under vibration. Ideal for applications requiring high tensile strength and precise fastening, these screws deliver consistent performance in demanding environments, supported by compliance with industry standards like ASTM A574.

Specification Summary & Compliance

This socket head cap screw features a 1 1/2"-12 UNRF thread with Class 2A fit for precise dimensional accuracy, ensuring smooth assembly and reliable thread engagement. Manufactured to meet ASTM A574 specifications, it guarantees high-strength alloy steel quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards for industrial use.