S-91251A803 5/8"-11 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 in high-stress industrial applications
- Superior corrosion resistance from black-oxide coating extends service life in demanding environments
- Precision Class 3A thread fit guarantees secure fastening and vibration resistance in critical assemblies
- High hardness rating (Rockwell C37) provides excellent wear resistance and durability
- Deep hex socket drive (1/2") allows for high torque application and secure installation
- Fully threaded design offers maximum grip length and uniform load distribution
- Regulatory compliance with RoHS 3 and REACH ensures environmental safety and global acceptance
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these black-oxide alloy steel socket head cap screws deliver exceptional performance where reliability is critical. The combination of high tensile strength (170,000 psi) and Rockwell C37 hardness makes them ideal for heavy machinery, automotive assemblies, and construction equipment where vibration resistance and durability are paramount. The UNRC coarse thread pattern ensures quick installation and superior holding power, while the black-oxide surface treatment provides enhanced corrosion protection in harsh operating conditions. These fully threaded fasteners with Class 3A precision threads maintain consistent clamping force, preventing loosening in high-vibration environments and reducing maintenance requirements.
Specification Summary & Compliance
This 5/8"-11 socket head cap screw features Class 3A thread fit for precision tolerance, UNRC coarse threads for optimal engagement, and meets ASTM A574 specifications for quality assurance. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets while maintaining the highest standards of performance and reliability.
