S-92865A355 1/2"-20 x 1 3/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with 120,000 psi tensile strength, ideal for demanding structural and machinery applications.
• Superior corrosion resistance due to the zinc plating, extending service life in various industrial environments.
• Reliable, fine-thread engagement with the 1/2"-20 UNF thread and Class 2A fit, ensuring vibration resistance and secure fastening.
• High-strength material performance from Grade 5 steel and Rockwell C25 hardness, providing excellent durability and shear strength.
• Efficient installation and removal facilitated by the external hex drive and hex head design, compatible with standard tools.
• Full-threaded design for maximum grip length and holding power along the entire 1-3/4" shank.
• Compliance with major industry standards including ASME B18.2.1, ensuring dimensional accuracy and interoperability.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to solve critical fastening challenges in heavy-duty industrial settings. The zinc plated steel construction offers robust protection against rust and corrosion, making it suitable for outdoor equipment, automotive assemblies, and structural frameworks exposed to harsh conditions. The 1/2"-20 UNF fine thread provides a tighter seal and superior resistance to loosening under vibration compared to coarse threads, which is vital for machinery and engine components. Its fully threaded design ensures consistent clamping force across the entire length, enhancing joint integrity in high-stress applications. By meeting ASME B18.2.1 specifications, this fastener delivers reliable performance, reducing the risk of assembly failures and maintenance downtime in professional engineering projects.

Specification Summary & Compliance

This fastener adheres to precise dimensional standards with a Class 2A thread fit for consistent assembly. It conforms to ASME B18.2.1 and SAE J429 specifications for Grade 5 hex head screws, ensuring mechanical properties and interchangeability. The product is also compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in regulated industries.