S-91251A758 9/16"-12 x 1 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish on alloy steel extends service life in demanding industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
- Coarse UNC threading allows for quicker installation and easier alignment in coarse-grained materials or where speed is critical.
- Hex socket drive design enables high-torque application with standard tools, preventing cam-out and ensuring flush mounting.
- Full threading along the 1 3/4" length offers versatile adjustment and clamping force distribution across the entire fastener.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material consistency and environmental safety for global supply chain integration.
Professional Applications & Engineering Value
Engineered for rigorous industrial use, these black-oxide alloy steel socket head cap screws address common challenges like vibration loosening and corrosion in machinery, automotive, and heavy equipment assemblies. The 9/16"-12 UNC coarse thread with Class 3A fit ensures rapid, secure fastening in high-vibration environments, while the 170,000 psi tensile strength and Rockwell C37 hardness provide durability under dynamic loads. The hex drive and fully threaded design facilitate easy installation in confined spaces, making them ideal for high-strength fastening applications where reliability and compliance with ASTM A574 standards are critical.
Specification Summary & Compliance
This socket head cap screw features a 9/16"-12 UNC coarse thread with Class 3A thread fit for precision and a length of 1 3/4". It meets ASTM A574 specifications for high-strength alloy steel, ensuring consistent mechanical properties. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for industrial use worldwide.
