S-92190A139 1/2"-13 x 2" ASME B18.2.1, SAE J429 Left-Hand Threaded Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 110,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Left-hand threading provides secure fastening in applications where right-hand rotation could cause loosening, ideal for specific machinery and equipment.
• Grade 5 steel construction with Rockwell C21 hardness offers superior durability and resistance to wear, extending the service life of your assemblies.
• Fully threaded design allows for maximum grip and holding power along the entire 2-inch length, ensuring a consistent and strong connection.
• Coarse UNC thread with Class 2A fit enables quicker installation and better performance in materials where fine threads might strip or fail.
• External hex drive and hex head facilitate easy installation and removal with standard tools, improving assembly efficiency in industrial settings.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and material sustainability, meeting global standards for responsible manufacturing.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address common industrial challenges, such as vibration-induced loosening and high tensile demands. The left-hand thread direction is critical in applications like rotating machinery, where standard right-hand threads may unscrew under operational forces. Made from high-strength steel and featuring a coarse UNC thread, it provides excellent grip in softer materials or where rapid assembly is needed. The fully threaded design ensures uniform stress distribution, reducing the risk of joint failure in heavy-duty equipment, automotive, and construction projects. By meeting ASME B18.2.1 and SAE J429 standards, it guarantees precision and reliability, making it a trusted choice for engineers seeking durable, compliant fasteners that enhance operational safety and efficiency.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances, including a Class 2A thread fit for consistent engagement and a 1/2"-13 UNC coarse thread size. It conforms to ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring high-quality production. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and health safety standards in industrial applications.