S-91251A181 1 1/8"-7 x 10" 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 industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish extends service life in demanding environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C37) provides excellent wear resistance, maintaining thread integrity through repeated use and assembly cycles.
- Coarse UNRC threads enable faster installation and better debris clearance, improving efficiency in rugged assembly conditions.
- Partially threaded design offers precise clamping control, allowing for secure fastening without unnecessary thread engagement.
- Large 7/8" hex drive accommodates high-torque applications, ensuring easy installation with standard industrial tools.
- Full compliance with ASTM A574 guarantees consistent quality and mechanical properties for critical engineering applications.
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, these black-oxide alloy steel socket head cap screws deliver exceptional performance in machinery assembly, construction equipment, and automotive manufacturing. The combination of 170,000 psi tensile strength and Rockwell C37 hardness addresses common failure points in high-vibration environments, while the coarse UNRC thread form ensures reliable engagement in materials where fine threads might strip or fail. The black-oxide surface treatment provides essential corrosion protection without compromising dimensional accuracy, making these partially threaded fasteners ideal for applications requiring precise clamp load distribution and resistance to environmental degradation.
Specification Summary & Compliance
This 10" socket head cap screw features Class 2A thread fit for standard industrial applications with 1 1/8"-7 UNRC coarse threads and 2 7/8" minimum thread length. Manufactured to ASTM A574 specifications for consistent mechanical properties and dimensional accuracy. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
