S-91251A810 5/8"-11 x 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 applications, reducing the risk of fastener failure.
- Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
- Class 3A thread fit offers superior precision and tight tolerances for secure, vibration-resistant assemblies.
- Partially threaded design allows for precise clamping force control and easier alignment in complex machinery setups.
- 1/2" hex drive and standard socket head enable easy installation with common tools, minimizing assembly time and labor costs.
- Rockwell C37 hardness ensures excellent wear resistance and durability under repetitive loads.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations for safe, global use.
Professional Applications & Engineering Value
This 5/8"-11 Black-Oxide Alloy Steel Socket Head Cap Screw is engineered to address critical challenges in heavy-duty industrial settings. The alloy steel construction combined with a black-oxide surface treatment resists rust and wear, making it ideal for applications in machinery, automotive assemblies, and construction equipment where exposure to moisture and friction is common. The coarse UNRC thread and Class 3A thread fit provide quick installation and high clamping force, reducing the risk of loosening under vibration. With a partially threaded rod type, it offers flexibility in positioning and secure fastening in pre-tapped holes, enhancing efficiency in manufacturing and maintenance operations. These features ensure long-term reliability, minimizing downtime and maintenance costs in demanding environments.
Specification Summary & Compliance
This socket head cap screw features precise Class 3A thread fit with UNRC coarse threads and a minimum thread length of 1 3/4". It meets ASTM A574 specifications for high-strength alloy steel fasteners and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard performance.
