S-91251A712 1/2"-13 x 1" 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 load-bearing capacity with 170,000 psi tensile strength for reliable performance in high-stress applications
- Superior corrosion resistance thanks to black-oxide coating on alloy steel, extending service life in demanding environments
- Precise thread engagement with Class 3A fit ensuring secure fastening and vibration resistance
- Optimized torque transmission through 3/8" hex drive design for easy installation with standard tools
- Full UNC coarse threading providing maximum grip and pull-out resistance across the entire 1" length
- Consistent mechanical properties with Rockwell C37 hardness maintaining dimensional stability under load
- Regulatory compliance assurance meeting ASTM A574, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical performance where standard fasteners fail. The combination of 170,000 psi tensile strength and Rockwell C37 hardness provides exceptional resistance to shear forces and permanent deformation in heavy machinery, automotive assemblies, and industrial equipment. The Class 3A thread fit with UNC coarse threading ensures rapid installation while maintaining vibration resistance in high-cycle applications. The black-oxide surface treatment creates a protective barrier against oxidation and chemical exposure, making these socket head cap screws ideal for manufacturing environments where corrosion resistance is essential. The 3/8" hex drive accommodates standard industrial tools for efficient maintenance and assembly operations.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNC coarse thread profile. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Standard inch measurements include 1/2"-13 thread size, 1" length, and 3/8" hex drive configuration.
