S-92505A090 5-40 x 3/8" ASME B18.3, ASTM F912 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit for precise, vibration-resistant fastening in demanding applications.
• Enhanced corrosion resistance provided by the black oxide finish, extending the screw's service life in various industrial environments.
• High-strength durability from alloy steel with Rockwell C45 hardness, ensuring the set screw withstands high stress without stripping or failing.
• Secure and flush installation due to the headless and extended tip design, ideal for applications where a protruding head is not permissible.
• Easy installation and removal with the 1/16" hex drive, allowing for efficient assembly and maintenance with standard tools.
• Reliable performance in coarse-thread applications with 5-40 UNC thread, providing quick assembly and strong holding in softer materials or where frequent adjustment is needed.
• Compliance with major industry standards including ASME B18.3, ensuring consistent quality and interoperability in professional settings.

Professional Applications & Engineering Value

This 5-40 UNC set screw is engineered to solve critical fastening challenges in industrial machinery, automotive assemblies, and precision equipment. The black oxide alloy steel construction offers excellent resistance to rust and wear, which is vital for components exposed to harsh conditions or chemicals. Its headless design and extended tip ensure a secure, flush fit, preventing movement in pulleys, gears, and collars—common pain points in rotating assemblies. The Class 3A thread fit and coarse thread spacing provide superior grip and ease of installation, reducing the risk of cross-threading and improving assembly efficiency. By meeting ASME B18.3 specifications, this screw delivers consistent performance, making it a reliable choice for engineers seeking durability and precision in right-hand thread applications.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a UNC thread type with 5-40 size. It is manufactured in accordance with ASME B18.3 specifications, ensuring reliability and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for use in various industrial and international markets.