S-91251A097 2-64 x 5/16" 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.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in critical assemblies.
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance, extending service life in various industrial environments.
- Fine UNF thread design allows for finer adjustments and better clamping force distribution in precision components.
- Standard hex socket drive enables easy installation with common tools, reducing assembly time and improving workflow efficiency.
- Full threading along the 5/16" length ensures consistent grip and load distribution across the entire fastener.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety, meeting stringent industry regulations.
Professional Applications & Engineering Value
This 2-64 UNF Socket Head Cap Screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in precision machinery. The Black-Oxide Alloy Steel construction, combined with a Rockwell C37 hardness rating, provides excellent durability and resistance to wear in high-cycle applications. The fine thread and Class 3A fit ensure tight tolerances, making it ideal for use in aerospace, automotive, and electronics assemblies where precise alignment and reliable fastening are critical. Its fully threaded design and hex drive facilitate quick, secure installations, reducing downtime and maintenance costs in production environments.
Specification Summary & Compliance
This fastener adheres to Class 3A thread fit for superior precision and meets ASTM A574 specifications for high-strength alloy steel socket head cap screws. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. The right-hand UNF fine thread and dimensional accuracy support consistent performance in industrial applications.
