S-90251A193 8-32 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with a durable nylon patch that maintains secure fastening from -50° to 250°F, preventing loosening in dynamic environments.
• Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh or moisture-prone industrial settings.
• Precise Class 3A thread fit ensures tighter tolerances and superior engagement for reliable, high-strength assemblies.
• Secure hex drive (5/64") allows for high torque application and easy installation with standard tools, reducing slippage risks.
• Hardened durability with Rockwell B80 hardness providing excellent wear resistance and long service life.
• Effective cup point design bites firmly into materials, enhancing grip and preventing rotational movement in shafts and collars.
• Compliance with ASME B18.3 standards guarantees consistent quality and interchangeability for professional engineering applications.

Professional Applications & Engineering Value

This 8-32 UNC Class 3A nylon patch locking set screw is engineered to address common challenges in machinery and equipment assembly, where vibration and thermal fluctuations can compromise fastener integrity. The coarse UNC thread and Class 3A fit provide superior holding strength in metals and plastics, while the nylon patch thread locker offers reliable resistance to loosening without requiring additional adhesives. Made from 18-8 stainless steel, it resists rust and corrosion in demanding environments such as automotive, aerospace, and manufacturing. The headless, hex drive design allows for flush mounting and easy access in confined spaces, making it a versatile solution for securing pulleys, gears, and other components subject to high stress.

Specification Summary & Compliance

This set screw features an 8-32 UNC coarse thread with a Class 3A thread fit for precision and strength. It is manufactured in compliance with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) compliant, ensuring adherence to environmental and safety standards. The product includes a nylon patch locking element and is made from 18-8 stainless steel with a hardness of Rockwell B80, providing consistent performance in industrial applications.