S-91251A930 1"-8 x 7" 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 demanding applications.
- Superior corrosion resistance provided by the black-oxide coating on alloy steel, extending service life in harsh industrial environments.
- High-precision Class 3A thread fit guarantees secure, vibration-resistant assemblies with minimal risk of loosening.
- 3/4" hex drive and standard socket head profile allow for easy installation and high torque application with common tools.
- Partially threaded design offers optimal clamping force control, ideal for applications requiring precise unthreaded shank sections.
- Coarse UNRC thread enables quick assembly and disassembly, improving efficiency in maintenance and production cycles.
- Rockwell C37 hardness provides excellent wear resistance, maintaining thread integrity through repeated use.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these socket head cap screws solve critical fastening challenges where vibration resistance and high clamp loads are paramount. The black-oxide alloy steel construction combined with Class 3A thread fit prevents corrosion-induced seizure and maintains dimensional stability in machinery, automotive assemblies, and construction equipment. The 1"-8 coarse UNRC thread ensures rapid installation in steel frameworks and structural components, while the partially threaded rod type allows precise positioning in jigs and fixtures. This combination addresses common failure points in dynamic loading environments, providing engineers with a reliable high-strength fastener solution that withstands both mechanical stress and environmental exposure.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit and UNRC coarse thread standards. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 7" length, 2½" minimum thread length, and inch system measurements throughout.
