S-91251A194 8-32 x 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
- Superior corrosion resistance with black-oxide coating, extending service life in demanding industrial environments.
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing failure risks.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in machinery and equipment.
- Rockwell C37 hardness offers excellent wear resistance, maintaining integrity through repeated use and heavy loads.
- Hex socket drive (9/64") design allows for easy installation and high torque application with standard tools, minimizing slippage.
- Fully threaded UNC coarse thread enables faster installation and strong holding power in various materials.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees quality, safety, and environmental standards for global industrial applications.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration loosening and material fatigue. The 8-32 UNC coarse thread and Class 3A fit ensure precise engagement in metals and plastics, reducing the risk of strip-out in high-cycle applications. With a Rockwell C37 hardness and 170,000 psi tensile strength, it withstands extreme mechanical stresses in automotive, aerospace, and heavy machinery assemblies. The hex drive facilitates secure tightening in confined spaces, while the black-oxide surface resists rust and wear, making it ideal for harsh environments where durability and reliability are critical.
Specification Summary & Compliance
This screw features a Class 3A thread fit for high precision, with UNC coarse threads and a fully threaded design per inch-based standards. It complies with ASTM A574 for quality assurance, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety adherence in industrial use.
