S-92190A131 1/2"-13 x 1 1/2" ASME B18.2.1, SAE J429 Left-Hand Threaded Medium-Strength Grade 5 Steel Hex Head Screws

Key Features & Benefits at a Glance

• High tensile strength of 110,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure under load.
• Grade 5 steel construction provides excellent durability and resistance to wear, extending service life in industrial environments.
• Left-hand UNC coarse threading offers secure fastening in applications requiring reverse-thread engagement, preventing loosening from counter-clockwise motion.
• Class 2A thread fit guarantees consistent, easy assembly while maintaining precise tolerances for smooth installation.
• Fully threaded design maximizes grip and load distribution along the entire length, enhancing joint integrity.
• External hex drive and 3/4" head width allow for high-torque application with standard tools, speeding up installation and maintenance.
• Compliance with ASME B18.2.1 and SAE J429 standards ensures interoperability and reliability in mechanical systems, meeting industry specifications.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical challenges in heavy-duty and reverse-thread applications, such as machinery, automotive, and construction equipment where vibration or rotational forces may cause standard fasteners to loosen. The left-hand UNC coarse thread provides a secure hold in scenarios requiring counter-directional engagement, while the high tensile strength of 110,000 psi and Rockwell C21 hardness ensure resilience under stress and impact. Made from robust steel and featuring a fully threaded design, it distributes load evenly, reducing stress concentration and minimizing the risk of shear failure. Ideal for industrial screws in assembly lines or maintenance tasks, this fastener enhances safety and longevity in mechanical fasteners systems, supporting efficient operations with its external hex drive for quick, tool-friendly installation.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent assembly and UNC coarse threading with a 1/2"-13 size. It meets ASME B18.2.1 and SAE J429 specifications for quality and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.