S-92865A004 1/4"-28 x 5/8" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 Steel Hex 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
- Superior tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Zinc plating provides excellent corrosion resistance, extending the service life of the screw in harsh or outdoor environments.
- Grade 5 steel construction with Rockwell C25 hardness offers a balance of strength and durability, suitable for demanding industrial uses.
- UNF fine thread design with Class 2A fit allows for precise engagement and vibration resistance, minimizing loosening over time.
- External hex drive and hex head design enable easy installation and removal with standard tools, improving assembly efficiency.
- Full threading along the 5/8" length ensures consistent clamping force and versatility in various material thicknesses.
- Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability in professional applications.
Professional Applications & Engineering Value
This Grade 5 steel hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and environmental corrosion. The UNF fine thread and Class 2A fit provide tight tolerances that enhance grip in metal assemblies, machinery, and structural frameworks, reducing maintenance needs. The zinc plating acts as a protective barrier against moisture and chemicals, making it ideal for automotive, construction, and heavy equipment sectors. With its high tensile strength and external hex drive, it ensures quick, secure fastening in time-sensitive operations, supporting efficient production and long-term reliability in industrial fastener systems.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 2A tolerance for precise fit, a length of 5/8", and full threading. It meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are adhered to in industrial supply chains.
