S-92620A571 1/4"-28 x 4" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex 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 150,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh or outdoor environments.
- Precision Class 2A thread fit guarantees smooth assembly and secure fastening, minimizing cross-threading issues.
- High hardness (Rockwell C33) provides excellent wear resistance and durability under heavy loads.
- Fully threaded design offers maximum grip and holding power along the entire 4" length for versatile installations.
- External hex drive allows for easy installation and removal with standard tools, improving maintenance efficiency.
- Compliance with ASME B18.2.1/SAE J429 standards ensures consistent quality and interchangeability in industrial settings.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical demands in heavy machinery, construction, and automotive assemblies where vibration and dynamic loads are common. The steel material combined with zinc yellow-chromate plating provides robust protection against rust and chemical exposure, making it ideal for outdoor or corrosive environments. With its 1/4"-28 UNF fine thread and Class 2A fit, it ensures precise alignment and secure fastening in components requiring fine adjustment and high clamping force. These screws deliver reliable performance in structural frames, engine mounts, and industrial equipment, reducing maintenance downtime and enhancing operational safety.
Specification Summary & Compliance
This fastener features a 1/4"-28 UNF fine thread with Class 2A thread fit for precise dimensional accuracy. It is manufactured to meet ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and performance. The screw is fully threaded and complies with industry standards for heavy-duty applications, with no specific RoHS or REACH non-compliances noted in the provided data.
