S-91274A292 3/8"-16 x 1/2" ASME B18.3, ASTM A574, ASTM B117 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 provided by the zinc-flake coating extends service life in harsh or outdoor industrial environments.
- Precise Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening.
- High hardness rating (Rockwell C37) enhances wear resistance and maintains thread integrity during repeated use.
- 5/16" hex drive design allows for easy installation and high torque application with standard tools.
- Full threading along the 1/2" length provides consistent clamping force and versatile positioning.
- Compliance with ASME B18.3 and ASTM A574 ensures dimensional accuracy and material quality for professional use.
Professional Applications & Engineering Value
This 3/8"-16 UNC Socket Head Cap Screw is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and environmental degradation. The zinc-flake-coated alloy steel construction offers robust protection against corrosion, making it ideal for machinery, automotive, and outdoor equipment exposed to moisture or chemicals. Its coarse UNC thread and Class 3A fit provide excellent grip in metals and plastics, reducing the need for frequent maintenance. With a 170,000 psi tensile strength and Rockwell C37 hardness, it withstands heavy loads and impacts, ensuring long-term reliability in demanding applications like structural frames, engine components, and precision tools.
Specification Summary & Compliance
This screw adheres to ASME B18.3 and ASTM A574 specifications, ensuring precise dimensions including a 3/8"-16 UNC thread with Class 3A fit for tight tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial use.
