S-91251A373 1/2"-13 x 1 7/8" 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.
- Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
- Heavy-duty alloy steel construction with Rockwell C37 hardness offers excellent durability and wear resistance for long-term use.
- 3/8" hex drive design allows for easy installation and removal with standard tools, improving workflow efficiency.
- Full threading and coarse UNC pattern enable quick engagement and strong holding power in various materials.
- Compliance with ASTM A574, RoHS 3, and REACH ensures consistent quality and environmental safety for global supply chain integration.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, automotive, and construction sectors. The high tensile strength and Class 3A thread fit prevent stripping and ensure stable fastening under dynamic loads, while the coarse UNC thread facilitates rapid assembly in tough materials. The black-oxide surface treatment resists rust and wear, making it ideal for outdoor or corrosive settings. Its fully threaded design and 3/8" hex drive simplify maintenance and provide uniform clamping force, reducing downtime and improving operational reliability in demanding industrial applications.
Specification Summary & Compliance
This socket head cap screw features a 1/2"-13 UNC coarse thread with Class 3A fit for precise dimensional accuracy, adhering to ASTM A574 manufacturing standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material consistency.
