S-92620A566 1/4"-28 x 1 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: With a 150,000 psi tensile strength, this screw provides reliable holding power for heavy-duty and high-vibration applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance: The zinc yellow-chromate plating offers enhanced protection against rust and corrosion, extending the service life of the fastener in harsh industrial environments.
• High-Strength Material Grade: Manufactured from Grade 8 steel with a Rockwell C33 hardness, ensuring excellent durability and resistance to wear and deformation under high stress.
• Precision Thread Fit: Class 2A thread fit and UNF fine threading provide a secure, tight connection with reduced likelihood of loosening, ideal for precision assemblies.
• Optimized for Standard Tools: The external hex head design allows for easy installation and removal using common wrenches, improving assembly efficiency and maintenance.
• Full Thread Engagement: Fully threaded design maximizes grip and load distribution along the entire length, enhancing joint integrity in critical applications.
• Compliance with Industry Standards: Meets ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality, dimensional accuracy, and reliability for engineering and manufacturing use.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address critical challenges in demanding industrial settings, such as machinery assembly, automotive systems, and structural frameworks. Its high-strength steel construction and UNF fine threading deliver superior clamping force and vibration resistance, preventing joint failure in high-stress environments. The zinc yellow-chromate plating provides a robust barrier against moisture and chemicals, reducing maintenance needs and downtime. By adhering to ASME B18.2.1 standards, it ensures precise fit and interchangeability, making it a trusted choice for engineers and procurement specialists seeking durability and compliance in heavy-duty fasteners.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 2A thread fit for accurate engagement and tolerance. It is fully threaded and right-hand oriented, with dimensions including a 1 1/2" length, 7/16" head width, and 11/64" head height. Manufactured to meet ASME B18.2.1 and SAE J429 specifications, it complies with industry standards for mechanical properties and dimensional consistency. The product is designed for high-performance applications, with no specific RoHS or REACH claims provided, but it aligns with common industrial regulatory expectations for quality and safety.