S-91251A913 1"-8 x 2 1/4" 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 in critical applications.
- Corrosion-resistant black-oxide finish on alloy steel enhances durability and longevity, even in harsh industrial environments.
- 3/4" hex drive design allows for superior torque transmission and easy installation with standard tools, minimizing assembly time.
- Class 3A thread fit provides precise, tight tolerances for secure fastening and vibration resistance in machinery and equipment.
- Fully threaded UNRC coarse thread offers quick engagement and strong holding power, ideal for heavy-duty assemblies.
- Rockwell C37 hardness ensures high wear resistance and maintains structural integrity over repeated use.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety regulations for global supply chain compatibility.
Professional Applications & Engineering Value
This socket head cap screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in demanding environments. Made from black-oxide alloy steel, it combines high tensile strength and hardness to withstand extreme loads without deformation. The coarse UNRC thread and Class 3A fit ensure quick, secure fastening in heavy machinery, automotive systems, and construction equipment, reducing maintenance needs. Its corrosion-resistant finish prolongs service life in humid or chemically exposed settings, while the 3/4" hex drive facilitates efficient installation with standard wrenches, saving time and labor costs in assembly lines.
Specification Summary & Compliance
This screw features a 1"-8 thread size with Class 3A thread fit and UNRC coarse thread for precise dimensional accuracy. It meets ASTM A574 specifications for high-strength fasteners and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial applications.
