S-91864A008 1-72 x 5/16" 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 the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, ideal for critical assembly applications.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance and a durable, non-reflective surface for harsh environments.
- Fine UNF thread design allows for finer adjustments and better load distribution in thin materials or precision assemblies.
- Fully threaded shank maximizes grip length and holding power across the entire fastener, improving joint integrity.
- Hex socket drive (1/16") enables high-torque installation with standard tools, minimizing stripping and ensuring secure tightening.
- Rockwell C37 hardness balances toughness and machinability, providing long-term durability without brittleness.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw with 1-72 UNF fine threads is engineered to address common industrial challenges such as vibration loosening and material fatigue. The Class 3A thread fit ensures tight tolerances for high-precision equipment, reducing maintenance needs in machinery, automotive, and aerospace assemblies. Its fully threaded design and high tensile strength provide consistent clamping force, making it suitable for compact spaces and dynamic loads. The corrosion-resistant black-oxide surface treatment extends service life in demanding environments, while the hex drive allows for efficient installation in restricted access areas, streamlining production and repair processes.
Specification Summary & Compliance
This screw adheres to ASTM A574 specifications, with a Class 3A thread fit for precise UNF fine threading. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. Dimensions include a 5/16" length and 1/16" hex drive, manufactured to exacting standards for consistent performance in industrial fastener applications.
