S-91251A457 0-80 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 in high-stress applications, reducing the risk of fastener failure.
- Precision Class 3A fine thread fit provides superior engagement and vibration resistance, minimizing loosening in dynamic environments.
- Black-oxide surface treatment on alloy steel enhances corrosion resistance, extending service life in demanding industrial conditions.
- Hex socket drive design allows for high torque application and easy installation in confined spaces with standard tools.
- Full threading along the 7/8" length offers versatile fastening depth and consistent holding power across the entire screw.
- Rockwell C37 hardness maintains structural integrity under heavy loads, preventing deformation and ensuring repeated usability.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety for global supply chain integration.
Professional Applications & Engineering Value
This 0-80 UNF socket head cap screw is engineered for precision assembly in industries like aerospace, automotive, and machinery manufacturing, where fine thread accuracy and high tensile strength are critical. The black-oxide alloy steel construction combats rust and wear, addressing common issues of corrosion in harsh environments. Its Class 3A thread fit ensures tight tolerances, reducing the need for re-tightening and maintenance in vibrating equipment. With a hex drive and fully threaded design, it simplifies installation in tight spaces, enhancing efficiency on production lines while meeting strict ASTM A574 specifications for reliable, long-term performance.
Specification Summary & Compliance
This screw adheres to UNF fine thread standards with a Class 3A thread fit for precise dimensional accuracy. It meets ASTM A574 manufacturing specifications, ensuring consistent quality and performance. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it supports environmental and safety standards for industrial use.
