S-91251A711 1/2"-13 x 7/8" 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 under extreme loads, reducing the risk of fastener failure in critical applications.
- Superior thread precision with Class 3A fit provides tighter tolerances and more secure fastening, minimizing vibration-induced loosening.
- Black-oxide coating on alloy steel offers enhanced corrosion resistance, extending service life in harsh industrial environments.
- Coarse UNC threading allows for quicker installation and superior holding power in softer materials or where rapid assembly is required.
- Fully threaded design ensures consistent engagement along the entire length, providing uniform clamping force and stability.
- High hardness rating (Rockwell C37) increases wear resistance, maintaining thread integrity through repeated use and disassembly.
- 3/8" hex drive compatibility enables easy installation with standard tools, streamlining assembly processes and reducing labor time.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these Socket Head Cap Screws deliver exceptional reliability where high vibration and heavy loads are common. The black-oxide alloy steel construction provides a durable barrier against rust and corrosion, making them ideal for machinery, automotive assemblies, and construction equipment exposed to harsh conditions. The coarse UNC threading and Class 3A thread fit ensure rapid, secure fastening in both metallic and non-metallic substrates, reducing installation time while preventing thread stripping. With fully threaded design and high tensile strength, they maintain joint integrity under dynamic stresses, offering engineers a trusted solution for critical connections that require long-term performance and minimal maintenance.
Specification Summary & Compliance
This Socket Head Cap Screw features precision 1/2"-13 UNC coarse threading with Class 3A thread fit for superior dimensional accuracy. Manufactured in compliance with ASTM A574 specifications, it ensures consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety standards for industrial use.
