S-92991A137 3/8"-16 x 1 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance due to brass construction, ensuring long-term reliability in harsh environments.
• High-strength Class 3A thread fit provides precise, secure fastening with minimal risk of loosening under vibration.
• Coarse UNC thread design enables quick and easy installation, reducing assembly time and labor costs.
• Hex drive (3/16") allows for high-torque application with standard tools, preventing stripping and ensuring a tight set.
• Rockwell B55 hardness offers excellent durability and wear resistance, maintaining performance over repeated use.
• Cup tip design ensures a firm grip on shafts or components, minimizing slippage and damage to contact surfaces.
• Headless, compact profile saves space in tight assemblies and provides a flush finish for streamlined applications.

Professional Applications & Engineering Value

This 3/8"-16 UNC brass set screw is engineered to address common industrial challenges, such as corrosion in moist or chemical-exposed settings. The brass material naturally resists rust and galvanic reactions, making it ideal for marine, plumbing, and electrical enclosures. Its coarse thread and hex drive simplify installation in high-volume production lines, while the Class 3A thread fit ensures consistent clamping force to prevent component drift in machinery, pulleys, and couplings. The cup tip securely bites into shafts, providing reliable positioning without marring surfaces, essential for precision equipment and rotating assemblies.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with a Class 3A thread fit for high precision and UNC coarse threads at 3/8"-16 size. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory adherence for global industrial use.