S-91251A990 1"-8 x 10 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 for reliable performance in high-stress industrial applications.
- Superior corrosion resistance with black-oxide coating, extending service life in demanding environments.
- Precise Class 3A thread fit ensures secure, vibration-resistant connections and reduces assembly issues.
- High torque capability from the 3/4" hex drive, allowing for easy installation and removal with standard tools.
- Durable alloy steel construction with Rockwell C37 hardness for long-term wear and fatigue resistance.
- Coarse UNRC threads enable quick assembly and are less prone to cross-threading in rugged conditions.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees safety and environmental standards for global use.
Professional Applications & Engineering Value
This socket head cap screw is engineered from black-oxide alloy steel to address common industrial challenges such as vibration loosening and corrosion in heavy machinery, automotive, and construction equipment. The coarse UNRC thread design facilitates faster installation in coarse-grained materials, reducing labor time while maintaining a secure hold. With a minimum thread length of 2 1/2 inches and Class 3A fit, it ensures tight tolerances that prevent backlash in dynamic loads, making it ideal for applications requiring repeated disassembly. The combination of high tensile strength and Rockwell C37 hardness provides reliable performance in extreme conditions, minimizing downtime and maintenance costs for B2B clients.
Specification Summary & Compliance
This product adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and UNRC coarse threads with a size of 1"-8. It meets ASTM A574 specifications for high-strength socket head cap screws and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.
