S-90044A218 2"-4 1/2 x 6" ASTM A574 Alloy Steel Socket Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads, reducing failure risks in critical applications.
• Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
• Rockwell C37 hardness offers superior wear resistance, maintaining thread integrity and dimensional stability over repeated use.
• 1 1/2" hex drive and 3" head diameter enable efficient torque application and secure fastening, minimizing tool slippage and installation time.
• UNC coarse threads with Class 2A fit facilitate quick assembly and disassembly, improving maintenance efficiency in machinery and equipment.
• Partially threaded design allows for precise clamping force distribution, ideal for applications requiring controlled grip length.
• Compliance with ASTM A574, RoHS 3, and REACH ensures adherence to international quality and environmental standards, supporting global supply chain requirements.

Professional Applications & Engineering Value

These Black-Oxide Alloy Steel Socket Head Cap Screws are engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in demanding settings. The coarse UNC threads and right-hand thread direction provide robust engagement in heavy machinery, construction equipment, and automotive assemblies, where high tensile strength and durability are paramount. The socket head design with a standard profile allows for compact installation in confined spaces, while the black-oxide surface treatment resists rust and wear, reducing maintenance downtime. Ideal for use in manufacturing, aerospace, and energy sectors, these fasteners deliver consistent performance under stress, ensuring long-term reliability and safety in industrial applications.

Specification Summary & Compliance

This product features precise Class 2A thread fit and UNC coarse threads with sizes ranging from 2" to 4 1/2", manufactured to ASTM A574 specifications for high-strength socket head cap screws. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence. The inch system measurements, including a minimum thread length of 5" and overall length of 6", support standardized industrial use.