S-91251A255 10-24 x 2 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 under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal loosening over time.
- High hardness (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use.
- Hex socket drive design allows for easy installation in confined spaces with standard tools, improving assembly efficiency.
- Coarse UNRC threads enable quick engagement and reduced cross-threading risks, speeding up production processes.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty applications, such as machinery assembly, automotive components, and industrial equipment. The high tensile strength (170,000 psi) and Rockwell C37 hardness provide resilience against dynamic loads and abrasion, minimizing maintenance downtime. Featuring 10-24 coarse UNRC threads and a partially threaded design, it offers optimal clamping force and ease of installation in tight spaces using a standard hex drive. The black-oxide surface treatment enhances corrosion resistance, making it suitable for environments exposed to moisture or chemicals, while complying with ASTM A574 ensures consistent quality for precision engineering projects.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise tolerance, with UNRC coarse threads (10-24 size) and a 2-1/2" length. It meets ASTM A574 manufacturing specifications for alloy steel socket head cap screws and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
