S-91864A039 5/16"-24 x 1 1/8" 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.
- Precision Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
- Black-oxide surface treatment on alloy steel offers enhanced corrosion resistance for extended service life in harsh industrial conditions.
- Fine UNF thread profile allows for finer adjustment and improved clamping force control compared to coarse threads.
- Standard hex socket drive with 1/4" size enables high torque application and easy installation in confined spaces.
- Full threading along the 1-1/8" length ensures consistent holding power and versatility in various assembly depths.
- Rockwell C37 hardness provides excellent durability and wear resistance, maintaining thread integrity through repeated use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in precision machinery, automotive assemblies, and heavy equipment manufacturing. The 5/16"-24 UNF fine thread with Class 3A tolerance delivers superior thread engagement, effectively combating vibration-induced loosening in high-cycle applications. The 170,000 psi tensile strength and Rockwell C37 hardness ensure reliable performance under extreme mechanical loads, while the black-oxide finish provides essential corrosion protection in demanding environments. These features make it ideal for applications requiring secure fastening in tight spaces where socket head design and fully threaded construction offer installation advantages over standard hex bolts.
Specification Summary & Compliance
This socket head cap screw features precision 5/16"-24 UNF fine threads with Class 3A fit for exacting dimensional requirements. Manufacturing complies with ASTM A574 specification for high-strength alloy steel socket head cap screws. The product meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental responsibility and regulatory adherence for global industrial applications.
