S-92190A123 3/8"-16 x 2 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

• Exceptional tensile strength of 110,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
• Rockwell C21 hardness provides superior resistance to wear and deformation, extending the service life of the screw.
• Left-hand UNC coarse threading offers secure fastening in applications where standard right-hand threads may loosen due to rotational forces.
• Fully threaded design allows for maximum grip and load distribution along the entire length, enhancing joint stability.
• Grade 5 steel construction delivers a robust balance of strength and durability, suitable for demanding industrial environments.
• External hex drive enables easy installation and removal with common tools, improving assembly efficiency.
• Compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interoperability with other standardized components.

Professional Applications & Engineering Value

This Grade 5 steel hex head screw is engineered to address critical challenges in industrial settings, such as vibration-induced loosening and high tensile loads. The left-hand UNC coarse thread is specifically designed for applications where counter-clockwise rotation is standard, preventing unintended disassembly in machinery, automotive, and heavy equipment. Made from high-strength steel and featuring a fully threaded shank, it ensures uniform stress distribution and superior clamping force. The external hex drive allows for straightforward installation with standard wrenches, reducing assembly time and labor costs. Ideal for use in construction, manufacturing, and maintenance operations, this screw provides a dependable left-hand fastening solution that enhances safety and reliability in dynamic environments.

Specification Summary & Compliance

This screw adheres to precise dimensional standards, including Class 2A thread fit for consistent engagement and UNC coarse threading with a size of 3/8"-16. It meets ASME B18.2.1 and SAE J429 specifications, ensuring compatibility and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in global supply chains.