S-91251A471 2-56 x 9/16" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in critical assemblies.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish suitable for industrial environments.
- Hex socket drive (5/64") allows for high-torque installation and removal in confined spaces, improving assembly efficiency.
- Fully threaded 2-56 UNC coarse thread design ensures maximum grip and holding power across the entire 9/16" length.
- Rockwell C37 hardness provides excellent wear resistance and durability, extending the screw’s service life in repetitive use.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency, environmental safety, and regulatory acceptance for global supply chains.
Professional Applications & Engineering Value
These socket head cap screws are engineered to address common industrial challenges such as vibration-induced loosening and material fatigue. The black-oxide alloy steel construction, combined with a Class 3A thread fit, ensures tight tolerances and reliable performance in precision machinery, automotive components, and electronic enclosures. The coarse UNC threads facilitate quick assembly and provide strong holding power, while the hex drive design enables secure tool engagement in space-constrained applications. Ideal for high-strength fastening in manufacturing and maintenance, these screws help reduce downtime and improve overall assembly integrity.
Specification Summary & Compliance
This product features a 2-56 UNC coarse thread with Class 3A precision fit, ensuring dimensional accuracy and consistent performance. Manufactured to ASTM A574 specifications, it meets rigorous quality standards for socket head cap screws. The screws are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), supporting environmentally responsible and safe usage in various industrial sectors.
