S-91251A741 1/2"-13 x 12" 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 industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish prolongs service life in harsh environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity and reducing loosening over time.
- High hardness (Rockwell C37) offers excellent wear resistance, maintaining thread integrity through repeated use and heavy loads.
- Coarse UNRC threading allows for quicker installation and easier alignment, saving time in assembly and maintenance operations.
- Partially threaded design concentrates strength where needed most, providing optimal clamping force without unnecessary weight.
- Hex socket drive enables high-torque application with standard tools, ensuring tight fastening in confined spaces.
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these black-oxide alloy steel socket head cap screws deliver critical performance where failure is not an option. The UNRC coarse thread design resists cross-threading during high-speed assembly, while the Class 3A thread fit maintains precise tolerances in vibration-prone machinery. The corrosion-resistant black-oxide surface treatment protects against moisture and chemical exposure in manufacturing, construction, and heavy equipment applications. With 170,000 psi tensile strength, these screws provide reliable fastening in structural frameworks, machine tools, and automotive assemblies where high-strength socket screws are essential for safety and longevity.
Specification Summary & Compliance
This socket head cap screw features precision Class 3A thread fit with UNRC coarse threading (1/2"-13) and ASTM A574 manufacturing standards. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries. Dimensions include 12" length with 1-1/2" minimum thread length, 3/4" head diameter, and 3/8" hex drive size for standardized tool compatibility.
