S-91274A448 1/2"-13 x 1 1/4" 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 provides superior resistance to mechanical failure in demanding applications.
- Zinc-flake-coated alloy steel construction offers excellent corrosion resistance, extending service life in harsh industrial environments.
- Class 3A thread fit ensures precise, tight, and reliable engagement for secure fastening in critical assemblies.
- 3/8" hex drive design allows for high torque application and easy installation with standard tools, reducing assembly time.
- Fully threaded body delivers consistent clamping force along the entire length for uniform load distribution.
- High hardness rating (Rockwell C37) enhances wear resistance and prevents thread deformation under stress.
- Compliance with major industry standards including ASME B18.3 and ASTM A574 guarantees consistent quality and performance.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this 1/2"-13 UNC Socket Head Cap Screw addresses critical engineering challenges such as vibration-induced loosening and environmental degradation. The zinc-flake-coated alloy steel material provides a robust barrier against corrosion, making it ideal for machinery, automotive assemblies, and construction equipment exposed to harsh conditions. The coarse UNC thread and Class 3A fit ensure rapid assembly and a secure, high-strength connection that maintains integrity under extreme loads. Its fully threaded design and 3/8" hex drive facilitate efficient installation in tight spaces, reducing downtime and improving operational reliability in industrial socket screw applications.
Specification Summary & Compliance
This socket head cap screw features a 1/2"-13 UNC coarse thread with a Class 3A thread fit for high precision. It is manufactured in compliance with ASME B18.3 and ASTM A574 specifications, ensuring dimensional accuracy and performance consistency. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for global industrial use.
