S-91251A793 5/8"-11 x 3/4" 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.
- Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Coarse UNC threads enable quicker installation and reduced cross-threading risk, saving time during assembly.
- Fully threaded design allows for consistent clamping force along the entire length, improving load distribution.
- 1/2" hex drive compatibility ensures easy installation with standard tools, streamlining workflow efficiency.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty machinery, automotive, and construction sectors. The Class 3A thread fit and coarse 5/8"-11 UNC threading provide superior resistance to loosening under dynamic loads, while the 170,000 psi tensile strength ensures durability in high-vibration environments. The black-oxide surface treatment combats corrosion, extending service life in exposed or humid conditions. Fully threaded and compliant with ASTM A574, it delivers reliable performance for precision assemblies requiring consistent clamping force and minimal maintenance.
Specification Summary & Compliance
This fastener features a Class 3A thread fit per UNC standards, ensuring precise dimensional accuracy. It meets ASTM A574 specifications for high-strength socket head cap screws and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use without hazardous substances.
