S-91251A383 5/16"-24 x 1" 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 in critical assemblies, minimizing loosening over time.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in demanding industrial environments.
- 1/4" hex drive socket head allows for high-torque installation with standard tools, facilitating efficient assembly and maintenance.
- Fully threaded design ensures consistent clamping force along the entire 1" length, ideal for applications requiring uniform load distribution.
- Fine UNF thread (5/16"-24) delivers improved holding power and finer adjustment capabilities compared to coarse threads.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chain integration.
Professional Applications & Engineering Value
Engineered for precision and durability, these socket head cap screws are crafted from black-oxide alloy steel to withstand harsh operational conditions. The Class 3A UNF fine threads provide excellent resistance to vibrational loosening, making them ideal for machinery, automotive, and aerospace applications where reliability is critical. With a Rockwell C37 hardness and high tensile strength, they prevent stripping and deformation under heavy loads. The standard socket head design enables easy access in confined spaces, streamlining maintenance and reducing downtime in industrial settings.
Specification Summary & Compliance
This fastener features a 5/16"-24 UNF fine thread with Class 3A fit for precise tolerances, ensuring consistent performance. It is manufactured in accordance with ASTM A574 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable use in global markets.
