S-91410A538 1/4"-20 x 5/8" ASME B18.6.2 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with coarse UNC threads that resist loosening under vibration and load
• Easy installation and high torque capability thanks to the external square drive design
• Exceptional durability and wear resistance provided by the steel construction and Rockwell B80 hardness
• Reliable and precise fit ensured by the Class 2A thread fit for consistent performance
• Secure fastening with the cup tip that digs into surfaces to prevent component slippage
• Broad industrial compatibility with compliance to ASME B18.6.2 standards for quality assurance
• Safe for regulated environments as it meets RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

This 1/4"-20 UNC steel set screw is engineered to solve critical fastening challenges in demanding industrial settings. The coarse thread and Class 2A fit provide excellent grip and ease of assembly, reducing installation time while maintaining high-strength under dynamic loads. The square head drive allows for high-torque application with standard tools, minimizing strip-out risks. Its Rockwell B80 hardness ensures long-term reliability in machinery, automotive, and assembly line applications where vibration resistance is paramount. The cup tip design offers superior biting action on shafts and collars, preventing rotational movement and enhancing the security of your mechanical systems.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for standard tolerance and interchangeability. It is manufactured in compliance with ASME B18.6.2 specifications, ensuring dimensional accuracy and performance reliability. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting strict environmental and safety standards for industrial use.