S-92620A567 1/4"-28 x 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, these screws withstand extreme forces in demanding industrial environments.
• Superior Corrosion Resistance: Zinc yellow-chromate plating provides excellent protection against rust and environmental degradation, extending service life.
• High-Strength Material Integrity: Grade 8 steel with Rockwell C33 hardness ensures exceptional durability and resistance to wear and deformation.
• Precision Thread Engagement: UNF fine threads with Class 2A fit offer reliable, vibration-resistant fastening in high-stress applications.
• Easy Installation and Removal: External hex drive design allows for straightforward application with standard tools, reducing assembly time.
• Full Thread Coverage: Fully threaded 2" length ensures consistent grip and load distribution across the entire fastener.
• Industry Standard Compliance: Manufactured to ASME B18.2.1 and SAE J429 specifications, guaranteeing consistent quality and interchangeability.

Professional Applications & Engineering Value

This Grade 8 hex head screw is engineered for heavy-duty applications where failure is not an option. The combination of high-strength steel and UNF fine threading provides superior resistance to loosening under vibration, making it ideal for machinery, automotive assemblies, and structural frameworks. The zinc yellow-chromate plating delivers robust corrosion protection, critical in harsh industrial or outdoor environments. Its fully threaded design ensures maximum engagement in thick materials, distributing stress evenly to prevent joint failure. By meeting ASME B18.2.1 standards, it offers reliable performance and compatibility in professional engineering projects requiring precise, high-tensile fastening solutions.

Specification Summary & Compliance

This fastener features a 1/4"-28 UNF fine thread with Class 2A tolerance for precise fit, and is fully threaded over its 2" length. It complies with ASME B18.2.1 and SAE J429 specifications, ensuring adherence to industry standards for dimensional accuracy and mechanical properties. The screw is manufactured from Grade 8 steel with a tensile strength of 150,000 psi and Rockwell C33 hardness, and includes a zinc yellow-chromate plating finish for enhanced durability and corrosion resistance.