S-91251A736 1/2"-13 x 6" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
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 extends the screw's lifespan in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies in critical machinery.
- High hardness rating (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Partially threaded design allows for controlled clamping force, ideal for applications requiring specific grip lengths.
- 3/8" hex drive compatibility enables easy installation with standard tools, speeding up assembly processes.
- Compliance with RoHS 3 and REACH ensures environmental safety and meets international regulatory standards for industrial use.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, this black-oxide alloy steel socket head cap screw combines high tensile strength and corrosion resistance to address common challenges in heavy machinery, automotive, and construction applications. The coarse 1/2"-13 thread and Class 3A fit ensure quick assembly and reliable holding power, even under dynamic loads and vibration. Its partially threaded shank provides optimal stress distribution, reducing the risk of loosening in critical joints. The black-oxide surface treatment not only enhances durability but also offers a layer of protection against rust, making it suitable for outdoor or humid environments where fastener integrity is paramount.
Specification Summary & Compliance
This screw adheres to ASTM A574 specifications, ensuring consistent quality and performance. It features a Class 3A thread fit for precise engagement and a coarse UNRC thread with a 1/2"-13 size. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries.
