S-91864A005 2-56 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
- Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides consistent engagement and vibration resistance in critical assemblies
- Hardened alloy steel construction with Rockwell C37 hardness maintains structural integrity under repeated use
- Standard hex drive compatibility with 5/64" drive size enables efficient installation with common tools
- Full thread coverage along the 5/16" length maximizes grip strength and load distribution
- Regulatory compliance assurance meeting ASTM A574, RoHS 3, and REACH standards for global industrial applications
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws with 2-56 UNC coarse threads deliver exceptional engineering value in precision assemblies where space constraints and reliability are paramount. The combination of 170,000 psi tensile strength and Rockwell C37 hardness ensures these fasteners withstand dynamic loads and vibration in machinery, automotive, and aerospace applications. The black-oxide surface treatment provides corrosion protection without dimensional compromise, while the standard hex drive design allows for high torque application in confined spaces. These socket head screws are engineered to prevent stripping and maintain clamping force in critical joints, reducing maintenance frequency and improving equipment uptime.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit for superior dimensional accuracy and UNC coarse thread profile for rapid assembly. These fully threaded socket head cap screws comply with ASTM A574 specification for high-strength alloy steel fasteners. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, ensuring environmental responsibility and global market acceptance for industrial fastener applications.
