S-92865A258 1/2"-13 x 4 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional Tensile Strength – With a 120,000 psi tensile strength, this screw provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Superior Corrosion Resistance – The zinc plating offers a protective barrier against rust and environmental elements, extending service life in demanding conditions.
• Easy Installation and Removal – The external hex drive and coarse UNC threads allow for quick, secure tightening with standard tools, saving time on assembly lines.
• High Durability and Hardness – Rockwell C25 hardness ensures the screw maintains its integrity under repeated loads and vibrations, ideal for machinery and structural uses.
• Precision Thread Fit – Class 2A thread fit guarantees consistent engagement and reduces cross-threading, enhancing connection reliability in industrial setups.
• Partial Threading Design – The partially threaded shank provides strong clamping force where needed, improving stability in assembled components.
• Compliance with Industry Standards – Meets ASME B18.2.1 and SAE J429 specifications, ensuring interoperability and safety in regulated environments.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered for heavy-duty applications where high tensile strength and durability are critical. Made from zinc plated steel, it combats corrosion in outdoor or humid settings, such as construction, automotive assemblies, and industrial machinery. The coarse UNC threads and external hex drive facilitate rapid installation, minimizing downtime in production lines. Its partially threaded design ensures optimal grip in bolted joints, preventing loosening under dynamic loads. By adhering to ASME B18.2.1 standards, this screw delivers consistent performance, reducing maintenance needs and enhancing the longevity of engineered systems.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC thread size with Class 2A thread fit for precise tolerance, and a length of 4 1/4". It complies with ASME B18.2.1 and SAE J429 manufacturing specifications, and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.