S-91251A819 5/8"-11 x 6 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 in high-stress industrial applications.
- Superior corrosion resistance from the black-oxide finish extends service life in harsh environments.
- Precise Class 3A thread fit guarantees secure fastening with minimal risk of loosening or failure.
- High hardness rating (Rockwell C37) provides excellent wear resistance and durability under heavy loads.
- Partially threaded design allows for optimal grip and alignment in assemblies requiring specific clamping zones.
- Coarse UNRC threads enable quick installation and removal, reducing assembly time and labor costs.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material quality and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these black-oxide alloy steel socket head cap screws deliver robust performance where corrosion resistance and high tensile strength are critical. The 5/8"-11 coarse UNRC threads and Class 3A fit provide secure fastening in machinery, automotive, and construction applications, minimizing vibration-induced loosening. With a partially threaded shank, they offer precise clamping force distribution, ideal for components requiring isolated thread engagement. The 1/2" hex drive facilitates easy installation with standard tools, enhancing efficiency in assembly lines. These screws are a reliable choice for engineers seeking durable, compliant fasteners that meet rigorous ASTM A574 standards while withstanding extreme operational stresses.
Specification Summary & Compliance
This product adheres to Class 3A thread fit for precise tolerance, with UNRC coarse threads and a minimum thread length of 1 3/4". It conforms to ASTM A574 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
