S-91864A021 4-48 x 1/2" 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 tensile strength of 170,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Precise Class 3A thread fit provides excellent engagement and vibration resistance, maintaining secure connections in machinery and equipment.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance, extending service life in industrial environments without compromising on durability.
- Fine UNF thread design allows for finer adjustments and better load distribution, ideal for precision assemblies requiring tight tolerances.
- Hex socket drive with 3/32" size enables easy installation in confined spaces, improving assembly efficiency and reducing tool slippage.
- Full threading along the 1/2" length ensures consistent grip and flexibility in various mounting scenarios, from electronics to heavy-duty fixtures.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees adherence to industry standards and environmental regulations, providing peace of mind for global supply chains.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges, such as vibration loosening and corrosion in harsh settings. The 4-48 UNF fine thread and Class 3A fit deliver superior clamping force and stability, making it ideal for precision equipment, automotive assemblies, and aerospace components where reliability is critical. Its high tensile strength and Rockwell C37 hardness ensure long-term performance without deformation, while the hex drive design simplifies maintenance in tight spaces. By integrating these features, it reduces downtime and enhances safety in industrial fastening applications, supporting efficient production workflows.
Specification Summary & Compliance
This screw features a 4-48 UNF fine thread with Class 3A tolerance for precise fit, manufactured in accordance with ASTM A574 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.
