S-92865A544 1/4"-20 x 1 1/4" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior tensile strength of 120,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Zinc plating provides excellent corrosion resistance, extending service life in harsh industrial environments and reducing maintenance costs.
• Grade 5 steel construction with Rockwell C25 hardness offers exceptional durability and wear resistance for long-term fastening integrity.
• Fully threaded UNC coarse thread design allows for faster installation and improved grip in a wide range of materials.
• External hex drive and hex head enable easy tightening with standard tools, enhancing assembly efficiency and reducing labor time.
• Class 2A thread fit ensures consistent, precise engagement with nuts and tapped holes, minimizing cross-threading and improving connection reliability.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees dimensional accuracy and interoperability, ensuring fit and function in regulated applications.

Professional Applications & Engineering Value

This Grade 5 hex head screw is engineered to address critical fastening challenges in demanding industrial settings. The zinc plated steel construction combats corrosion, making it ideal for outdoor machinery, automotive assemblies, and structural frameworks exposed to moisture. Its 1/4"-20 UNC coarse thread and fully threaded design provide superior holding power in wood, metal, and composite materials, reducing the likelihood of loosening under vibration. With a tensile strength of 120,000 PSI and Rockwell C25 hardness, it withstands heavy loads and repetitive stress, ensuring long-term reliability in construction, manufacturing, and equipment maintenance. The external hex drive facilitates quick installation with common wrenches, streamlining production lines and repair operations.

Specification Summary & Compliance

This fastener features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional tolerance. It meets ASME B18.2.1 and SAE J429 specifications, ensuring consistent quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and use in global markets.