S-90128A594 5/16"-18 x 2 3/4" 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 zinc plating that protects against rust in demanding industrial environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress applications
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Optimized torque transmission through 1/4" hex drive design prevents stripping and enables secure installation
- Rockwell C37 hardness maintains structural integrity and prevents deformation during repeated use
- Versatile partial threading allows for both clamping and alignment functions in complex assemblies
- Industry compliance assurance with ASTM A574, RoHS 3, and REACH standards for global acceptance
Professional Applications & Engineering Value
These zinc-plated alloy steel socket head cap screws deliver critical performance in demanding industrial applications where failure is not an option. The 5/16"-18 UNC coarse thread configuration provides excellent engagement in both metals and plastics, while the Class 3A thread fit ensures precise mating with tapped holes, reducing the risk of cross-threading during assembly. The 1/4" hex drive socket head design allows for high torque application in confined spaces, making these fasteners ideal for machinery, automotive components, and heavy equipment where vibration resistance and reliable clamping force are essential. The partial threading offers flexibility for applications requiring both precise positioning and strong clamping action.
Specification Summary & Compliance
This socket head cap screw features precision 5/16"-18 UNC coarse threads with Class 3A fit for superior engagement and meets ASTM A574 specifications for high-strength requirements. The fastener maintains dimensional accuracy with a minimum thread length of 1-1/8" and overall length of 2-3/4". Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance for industrial applications.
