S-91251A771 1 3/8"-6 x 5" 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 industrial applications, reducing the risk of fastener failure.
- Corrosion-resistant black-oxide coating enhances durability and longevity, protecting against rust in harsh environments.
- High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
- Class 2A thread fit with UNC coarse threads allows for easier and faster assembly, minimizing installation time and labor costs.
- Fully threaded design offers consistent clamping force along the entire length, improving joint stability.
- Hex socket drive with 1" drive size enables secure tool engagement and high torque application, preventing stripping and ensuring tight fastening.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting strict industry and regulatory standards.
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 1 3/8"-6 UNC coarse thread and Class 2A fit provide superior vibration resistance and ease of installation in high-load assemblies, reducing maintenance downtime. The corrosion-resistant black-oxide surface treatment protects against moisture and chemicals, extending service life in demanding environments. With a fully threaded rod type and high tensile strength, it ensures uniform stress distribution and reliable performance in structural applications, making it an ideal choice for engineers seeking durability and compliance with ASTM A574 standards.
Specification Summary & Compliance
This socket head cap screw features precise Class 2A thread fit and UNC coarse threads with a diameter of 1.375" and 5" length, manufactured to ASTM A574 specifications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.
