S-92202A315 1/4"-20 x 1/2" Left-Hand Threaded 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable load-bearing capacity and resistance to mechanical failure in demanding applications.
• Precise Class 3A thread fit provides excellent engagement and vibration resistance for secure fastening in critical assemblies.
• Left-hand UNC coarse threading offers specialized functionality for applications requiring reverse-threading to prevent loosening under counter-clockwise rotation.
• Durable Rockwell B70 hardness maintains structural integrity and wear resistance under repeated use and high-stress conditions.
• 3/16" hex drive design allows for easy installation and removal with standard tools, reducing assembly time and improving efficiency.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets international standards for industrial components.

Professional Applications & Engineering Value

This 1/4"-20 UNC left-hand thread socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in machinery, automotive, and aerospace systems. The 18-8 stainless steel material provides excellent resistance to rust and chemical exposure, making it suitable for outdoor or high-moisture environments. With its coarse threading and Class 3A fit, it ensures quick assembly and reliable retention in components subject to dynamic loads. The left-hand thread direction is particularly valuable in applications where standard right-hand threads may unscrew due to rotational forces, enhancing safety and operational reliability. Its fully threaded design and standard socket head profile facilitate uniform clamping force and accessibility in confined spaces, supporting efficient maintenance and reducing downtime.

Specification Summary & Compliance

This fastener adheres to UNC coarse thread standards with a precise Class 3A thread fit for superior dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial use. Manufactured to consistent specifications including a 1/2" length, 3/8" head diameter, and Rockwell B70 hardness, it delivers reliable performance in accordance with industry benchmarks for strength and durability.