S-91251A063 1/2"-20 x 5/8" 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
- Superior corrosion resistance with black-oxide coating, extending service life in demanding environments
- Exceptional tensile strength of 170,000 psi ensures reliable performance under high-stress conditions
- Precision Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Fine UNF thread profile offers enhanced clamping force and superior adjustment precision
- Hardened alloy steel construction (Rockwell C37) maintains structural integrity under repeated loading
- Standard hex socket drive allows for high-torque installation in confined spaces
- Full thread coverage enables consistent fastening performance along the entire screw length
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw delivers critical performance advantages in heavy-duty industrial applications where reliability is paramount. The combination of Class 3A UNF fine threads and 170,000 psi tensile strength addresses common failure points in high-vibration environments, preventing loosening and maintaining joint integrity. The corrosion-resistant black-oxide finish protects against environmental degradation in manufacturing equipment, automotive assemblies, and machinery where exposure to moisture and chemicals is common. The standard hex socket drive facilitates installation in tight spaces while allowing for high torque application, making these socket head cap screws ideal for precision equipment, tooling fixtures, and structural applications requiring both strength and accessibility.
Specification Summary & Compliance
Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNF 1/2"-20 fine thread configuration. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The inch system measurement ensures dimensional consistency with 5/8" length and 3/8" hex drive specifications maintained to industrial standards for reliable interchangeability and performance.
