S-91251A715 1/2"-13 x 1 3/8" 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.
- Black-oxide coating on alloy steel provides enhanced corrosion resistance, extending service life in harsh industrial environments.
- Precise Class 3A thread fit delivers superior engagement and vibration resistance, minimizing loosening in dynamic operations.
- Fully threaded UNRC coarse design allows for easy installation and maximum grip across the entire length, ideal for varied material thicknesses.
- Hex socket drive with 3/8" size enables secure tool engagement and high torque application without slippage, boosting assembly efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting rigorous industry standards.
- Rockwell C37 hardness ensures durability and wear resistance, maintaining integrity under repeated use and heavy loads.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this black-oxide alloy steel socket head cap screw addresses critical challenges in machinery, automotive, and construction sectors. The coarse UNRC threads and Class 3A fit provide excellent vibration resistance and secure fastening in high-load assemblies, preventing joint failure. Its fully threaded 1/2"-13 design ensures uniform stress distribution, while the hex socket head allows for compact installation in confined spaces. Ideal for heavy-duty applications, this fastener combats corrosion and wear, delivering long-term reliability and reduced maintenance costs in corrosive or high-torque environments.
Specification Summary & Compliance
This socket head cap screw features precise Class 3A thread fit and adheres to UNRC coarse thread standards, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASTM A574 for material consistency, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental and safety adherence without restricted substances.
