S-91251A362 3/8"-16 x 11" 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 under high-stress conditions, reducing failure risks in critical assemblies.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic applications.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish for harsh environments.
- Hex socket drive design allows for high-torque installation with standard 5/16" tools, enabling secure fastening in confined spaces.
- Rockwell C37 hardness delivers excellent wear resistance, extending service life in repetitive or abrasive conditions.
- Coarse UNC threads facilitate quick assembly and disassembly, improving efficiency in maintenance and production lines.
- Partially threaded shank provides unthreaded bearing surface for precise clamping without thread damage.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in demanding applications. The 3/8"-16 UNC coarse thread configuration ensures rapid installation in machinery, automotive, and heavy equipment assemblies, while the Class 3A thread fit maintains tight tolerances for secure connections. The combination of 170,000 psi tensile strength and Rockwell C37 hardness provides durability against dynamic loads and wear, making it ideal for high-stress environments. The hex drive design accommodates standard tools, simplifying maintenance in confined spaces commonly found in manufacturing and construction sectors.
Specification Summary & Compliance
This screw features Class 3A thread fit per UNC standards with a 3/8"-16 thread size and coarse thread spacing. It meets ASTM A574 specifications for high-strength requirements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
