S-92190A111 3/8"-16 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

• Exceptional tensile strength of 110,000 PSI for reliable performance in high-stress applications, reducing the risk of fastener failure.
• Left-hand threading provides secure fastening in applications where right-hand threads may loosen due to rotational forces, enhancing operational safety.
• Grade 5 steel construction with Rockwell C21 hardness ensures superior durability and resistance to wear, extending service life in demanding environments.
• Coarse UNC thread profile allows for quicker installation and better performance in materials prone to stripping or where debris accumulation is a concern.
• Fully threaded design offers consistent grip along the entire length, improving load distribution and joint integrity.
• External hex drive and hex head enable easy installation and removal with standard tools, reducing assembly time and labor costs.
• Compliance with ASME B18.2.1, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations, supporting responsible sourcing and usage.

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 demands. The left-hand thread is particularly valuable in machinery where counter-rotational forces are present, preventing unintended disassembly in equipment like pumps, motors, and conveyor systems. Made from robust steel and featuring a coarse UNC thread, it excels in applications involving soft materials or corrosive environments, minimizing cross-threading and ensuring reliable fastening. The fully threaded design enhances load-bearing capacity, making it ideal for structural assemblies, heavy-duty fixtures, and automotive components. By combining high tensile strength with standardized dimensions, this screw reduces maintenance downtime and supports efficient, long-term performance in sectors like manufacturing, construction, and machinery repair.

Specification Summary & Compliance

This screw adheres to precise dimensional tolerances, including Class 2A thread fit for consistent engagement and UNC coarse threads per industry standards. It meets ASME B18.2.1 specifications for hex head fasteners and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it is free from hazardous substances and suitable for global industrial use.