S-90044A142 5/16"-18 x 2 3/4" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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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 enhanced corrosion resistance and a durable, non-reflective finish for extended service life.
- Class 3A thread fit offers superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding environments.
- Fully threaded UNRC coarse thread design allows for faster installation and improved grip in a wide range of materials.
- Hex socket drive (1/4") enables high-torque application with standard tools, minimizing stripping and ensuring efficient assembly.
- Compliance with ASTM A574 guarantees consistent quality and mechanical properties for critical engineering applications.
- RoHS 3 and REACH compliance ensures environmental safety and regulatory adherence for global industrial use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening and corrosion in machinery, automotive, and heavy equipment assemblies. The coarse UNRC thread and Class 3A fit provide excellent holding power and ease of installation in both soft and hard materials, reducing assembly time and maintenance needs. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme loads and repetitive stress, making it ideal for high-performance applications where reliability is critical. The combination of robust material properties and precise manufacturing ensures long-term durability and operational safety.
Specification Summary & Compliance
This socket head cap screw features a 5/16"-18 thread size with Class 3A thread fit for high precision, and a length of 2-3/4". It conforms to ASTM A574 specifications for alloy steel socket head cap screws, ensuring consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible and safe industrial use.
