S-91251A735 1/2"-13 x 5 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 extends service life in harsh environments, minimizing maintenance and replacement costs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and safety.
- Partially threaded design allows for optimal clamping force and ease of alignment in machinery and structural setups.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Hex socket drive enables easy installation with standard tools, saving time and labor in tight spaces.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy-duty industries, such as machinery assembly, automotive manufacturing, and construction. The UNRC coarse thread and Class 3A fit deliver superior grip and vibration resistance, preventing loosening under dynamic loads. With a partially threaded rod type, it provides focused clamping force, reducing stress concentration and improving joint reliability. The black-oxide surface treatment combats rust and corrosion, making it ideal for outdoor or humid conditions. Backed by ASTM A574 specifications, this screw ensures consistent quality and durability, supporting long-term operational efficiency in demanding applications.
Specification Summary & Compliance
This socket head cap screw adheres to inch system measurements with a thread size of 1/2"-13 and a Class 3A thread fit for precise tolerance. It meets ASTM A574 manufacturing standards, ensuring high strength and reliability. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for environmental and health standards in industrial use.
