S-91251A680 7/16"-14 x 2 3/4" 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 prolongs service life in harsh environments, minimizing maintenance and replacement costs.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, enhancing joint integrity.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread form and drive integrity through repeated use.
- Partially threaded design allows for controlled clamping force and easier alignment in assemblies, speeding up installation.
- Hex socket drive (3/8") enables high-torque application with standard tools, reducing slippage and improving workplace safety.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety, meeting global regulatory standards.
Professional Applications & Engineering Value
Engineered for demanding environments, these black-oxide alloy steel socket head cap screws address common industrial challenges such as vibration loosening and corrosion. The 7/16"-14 UNC coarse threads with a Class 3A fit deliver superior holding power in metals and plastics, ideal for machinery, automotive, and heavy equipment assemblies. The partially threaded rod design concentrates stress appropriately, while the hex drive allows efficient installation in confined spaces. With a 170,000 psi tensile strength and Rockwell C37 hardness, these fasteners withstand extreme loads and repetitive use, reducing downtime and ensuring long-term reliability in critical applications.
Specification Summary & Compliance
This socket head cap screw features a 2 3/4" length with a minimum thread length of 1 3/8", UNC coarse threads, and precise Class 3A thread fit per inch-based standards. It complies with ASTM A574 for material and manufacturing consistency, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety, ensuring suitability for global supply chains and industrial use.
