S-92158A135 4-40 x 3/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel material, ideal for harsh or marine environments where rust can compromise equipment integrity.
• Precise Class 3A thread fit ensures tight, reliable fastening with minimal risk of loosening under vibration or dynamic loads.
• Hex drive design (0.050") allows for easy installation and removal with standard tools, reducing assembly time and labor costs.
• Flat tip configuration provides secure, non-marring contact on shafts or components, preventing damage and maintaining alignment.
• High mechanical strength backed by Rockwell B80 hardness, offering durability and resistance to wear in demanding industrial applications.
• Headless, right-hand coarse thread (UNC) design enables flush mounting and quick engagement, suitable for space-constrained assemblies.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees adherence to industry standards and environmental safety, ensuring reliability and regulatory acceptance.

Professional Applications & Engineering Value

This 4-40 UNC set screw in 316 stainless steel is engineered to address common industrial challenges, such as corrosion in humid or chemical-exposed settings. Its hex drive and Class 3A thread fit provide exceptional holding power, reducing the risk of fastener failure in machinery, automotive, or electronics where vibration is a concern. The coarse thread spacing and flat tip enhance grip and prevent slippage, making it ideal for securing collars, pulleys, and other components without surface damage. By combining high hardness (Rockwell B80) with regulatory compliance, this set screw delivers long-term performance and safety in industrial applications, minimizing maintenance and downtime.

Specification Summary & Compliance

This set screw features a 4-40 UNC thread with Class 3A fit for precise dimensional accuracy, ensuring consistent performance. It meets ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally sensitive and industrial safety requirements.