S-92620A600 5/16"-18 x 5 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Maximum Load-Bearing Capacity: With a tensile strength of 150,000 psi, this screw withstands extreme forces, reducing the risk of failure in critical applications.
• Superior Corrosion Resistance: Zinc Yellow-Chromate plating provides a durable barrier against rust and environmental degradation, extending service life in harsh conditions.
• High Hardness for Durability: Rockwell C33 hardness ensures the screw maintains its shape and thread integrity under high stress and repeated use.
• Easy Installation with Coarse Threads: UNC coarse thread design allows for quicker assembly and better performance in materials like steel and cast iron.
• Precise Thread Fit for Reliability: Class 2A thread fit ensures consistent, secure fastening with standard nuts, minimizing loosening from vibration.
• Full Threading for Versatile Grip: Fully threaded design provides uniform clamping force along the entire length, ideal for varying material thicknesses.
• Standard Compliance for Quality Assurance: Manufactured to ASME B18.2.1 and SAE J429 specifications, guaranteeing interchangeability and performance in industrial systems.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered to address common industrial challenges, such as structural integrity loss and corrosion in demanding environments. Made from high-strength steel and featuring a zinc yellow-chromate plated finish, it resists oxidation and wear in applications like heavy machinery, construction frameworks, and automotive assemblies. The external hex drive and coarse UNC threads enable efficient installation with standard tools, reducing assembly time while providing a secure fit. Its fully threaded design ensures consistent load distribution, making it suitable for high-vibration settings where fastener loosening is a concern. By meeting ASME B18.2.1/SAE J429 standards, it delivers reliable performance in industrial screws and high-strength fasteners, minimizing downtime and maintenance costs.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and UNC coarse threads with a size of 5/16"-18. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring quality and reliability. The inch-based measurements, such as a length of 5 1/2", support compatibility in systems requiring imperial units. Additionally, the materials and finish are designed to meet general industry regulations for safety and performance.