S-92620A568 1/4"-28 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 150,000 PSI ensures reliable performance in high-stress and heavy-duty applications, reducing the risk of fastener failure.
• Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh environments, minimizing maintenance and replacement costs.
• Precision UNF fine threading with Class 2A fit provides secure, vibration-resistant connections, enhancing assembly integrity and safety.
• High hardness (Rockwell C33) offers excellent wear resistance, maintaining fastener integrity under repeated use and load.
• Fully threaded design allows for maximum grip and uniform clamping force across the entire length, ideal for thick materials.
• External hex drive and hex head enable easy installation and removal with standard tools, improving efficiency in industrial settings.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability, meeting rigorous engineering requirements.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in demanding industrial environments, such as machinery assembly, construction, and automotive applications. The steel construction combined with a zinc yellow-chromate plating provides robust protection against corrosion, reducing downtime in humid or chemically aggressive settings. Its UNF fine threading and Class 2A thread fit ensure tight, secure fastening that resists loosening under vibration, a common issue in dynamic systems. With a fully threaded design and high tensile strength, it delivers uniform load distribution and reliable performance in heavy-duty fastening tasks, making it a trusted choice for engineers seeking durability and compliance with ASME B18.2.1 and SAE J429 specifications.

Specification Summary & Compliance

This fastener features precise Class 2A thread fit and adheres to UNF fine thread standards with a size of 1/4"-28. It meets ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring dimensional accuracy and reliability. The product complies with industry standards for high-strength applications, providing assurance of quality and performance in professional use.