S-91251A607 1 1/2"-12 x 3" 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 industrial environments, reducing the risk of fastener failure.
• Black-oxide coating on alloy steel provides superior corrosion resistance and a durable, non-reflective finish for extended service life.
• UNRF fine threading with Class 2A fit delivers precise engagement and vibration resistance, ideal for applications requiring secure, tight fastening.
• Hex socket drive design allows for easy installation and removal in confined spaces with standard tools, enhancing assembly efficiency.
• Full threading along the 3" length offers versatile mounting options and uniform load distribution across the entire screw.
• Rockwell C37 hardness maintains structural integrity under heavy loads, minimizing wear and deformation over time.
• Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for safe, global use.

Professional Applications & Engineering Value

This Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in demanding sectors like machinery assembly, automotive, and construction. Its UNRF fine thread and Class 2A fit provide superior resistance to loosening under vibration, a common issue in dynamic environments. The alloy steel construction, combined with a black-oxide surface treatment, enhances durability against corrosion and wear, extending component life in harsh conditions. With a 1" hex drive and standard socket head profile, it enables efficient installation in tight spaces, reducing labor time. Ideal for heavy-duty fastening applications, this screw ensures reliable performance where high tensile strength and precision are paramount, supporting seamless operations in industrial settings.

Specification Summary & Compliance

This socket head cap screw features precise inch system dimensions, including a 1 1/2"-12 UNRF fine thread with Class 2A tolerance for accurate fit and performance. It meets ASTM A574 specifications for high-strength alloy steel fasteners and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.