S-91274A194 3/4"-10 x 2 1/2" ASME B18.3, ASTM A574, ASTM B117 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.
- Superior corrosion resistance provided by zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
- Precise Class 3A thread fit guarantees secure, vibration-resistant connections, enhancing assembly integrity and safety.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and disassembly.
- Coarse UNC threading allows for faster installation and easier alignment, improving efficiency in production and maintenance workflows.
- Hex socket drive design enables high torque application with standard tools, ensuring tight fastening in confined spaces.
- Compliance with major standards including ASME B18.3 and ASTM A574 ensures consistent quality and interoperability in regulated industries.
Professional Applications & Engineering Value
This Socket Head Cap Screw is engineered from zinc-flake-coated alloy steel to address critical challenges in heavy machinery, automotive, and construction sectors. Its 3/4"-10 UNC coarse thread and Class 3A fit provide superior grip and vibration resistance, preventing loosening under dynamic loads. The partially threaded design concentrates strength where needed, while the hex drive facilitates secure installation in tight access areas. Ideal for high-strength fastening in corrosive environments, it reduces downtime and enhances structural reliability in demanding applications like equipment frames, hydraulic systems, and industrial assemblies.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy, manufactured per ASME B18.3 and ASTM A574 specifications. It meets ASTM B117 for corrosion testing and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.
