S-90044A228 2 1/4"-8 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 in high-stress industrial applications, reducing the risk of fastener failure.
• Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in harsh environments, minimizing maintenance needs.
• Precise Class 2A thread fit with UN coarse threads provides easy assembly and secure fastening, improving installation efficiency.
• High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity under repeated use.
• 1 3/4" hex drive design allows for high torque application with standard tools, ensuring tight and stable connections.
• Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global industrial standards.
• Partially threaded shank enables optimal grip and alignment in assemblies, enhancing structural stability.

Professional Applications & Engineering Value

This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industrial settings, such as machinery, construction, and automotive systems. Its 2 1/4"-8 coarse thread and Class 2A fit ensure rapid, secure fastening even in high-vibration environments, reducing assembly time and preventing loosening. The alloy steel material combined with a black-oxide surface treatment provides robust resistance to corrosion and wear, extending component lifespan in demanding conditions. With a 170,000 PSI tensile strength and Rockwell C37 hardness, it delivers reliable performance under extreme loads, making it ideal for applications where durability and precision are paramount, such as in structural frames and heavy equipment fastening.

Specification Summary & Compliance

This screw features a 2 1/4"-8 UN coarse thread with Class 2A dimensional accuracy for consistent fit and ease of use. It is manufactured in accordance with ASTM A574 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for industrial applications.