S-90128A323 1/2"-13 x 1 5/8" ASME B18.3, 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.
- Superior corrosion resistance from zinc-plated alloy steel construction extends service life in harsh industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant connections with minimal risk of loosening.
- Full UNC coarse threading enables faster installation and better performance in softer materials or where debris is present.
- Standard hex socket drive allows for high-torque application with common tools, ensuring easy installation and removal.
- Compliance with major standards including ASME B18.3 and ASTM A574 guarantees consistent quality and engineering reliability.
- Rockwell C37 hardness rating maintains thread integrity and drive features under heavy mechanical loads.
Professional Applications & Engineering Value
These zinc-plated alloy steel socket head cap screws deliver critical performance advantages in demanding industrial applications where failure is not an option. The combination of 170,000 PSI tensile strength and Class 3A UNC coarse threads provides exceptional clamping force and vibration resistance in heavy machinery, automotive assemblies, and structural frameworks. The zinc plating offers superior corrosion protection for extended service life in challenging environments, while the standard hex socket drive enables precise torque application in confined spaces. Engineered to meet ASME B18.3 specifications, these fully threaded fasteners ensure consistent performance across manufacturing, construction, and equipment maintenance applications where reliability and durability are paramount.
Specification Summary & Compliance
This socket head cap screw features precision 1/2"-13 UNC coarse threads with Class 3A fit for superior thread engagement and dimensional accuracy. Manufactured from zinc-plated alloy steel with Rockwell C37 hardness and 170,000 PSI tensile strength. Complies with ASME B18.3 dimensional standards and ASTM A574 material specifications. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance for use in regulated industries.
