S-91251A957 7/16"-20 x 1/2" 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.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish.
- Fully threaded design allows for maximum adjustability and consistent clamping force along the entire length.
- Fine UNF thread profile delivers improved torque control and better load distribution compared to coarse threads.
- 3/8" hex drive socket enables high-torque installation with standard tools, facilitating efficient assembly and maintenance.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
This 7/16"-20 UNF Socket Head Cap Screw is engineered to address critical challenges in heavy-duty machinery, automotive assemblies, and precision equipment. The black-oxide alloy steel construction combats wear and corrosion in harsh operational environments, while the fine thread and Class 3A fit ensure secure fastening under vibration and dynamic loads. Its fully threaded rod type allows for versatile positioning and uniform stress distribution, making it ideal for applications requiring high clamp load and reliability. By meeting ASTM A574 specifications, it provides consistent mechanical properties, reducing downtime and maintenance costs in industrial settings.
Specification Summary & Compliance
This socket head cap screw features a 7/16"-20 UNF fine thread with Class 3A thread fit for precise tolerance, a right-hand thread direction, and dimensions in the inch system (e.g., 1/2" length, 21/32" head diameter). It is manufactured in accordance with ASTM A574 standards and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety adherence.
