S-90778A151 6-32 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh industrial and marine environments
• Maximum holding power and vibration resistance from the 90° cone point that bites securely into mating materials
• Precise, reliable fit ensured by Class 3A thread tolerance for reduced assembly play and improved joint integrity
• High-strength durability with Rockwell B80 hardness, providing excellent resistance to deformation under load
• Easy, flush installation thanks to the headless hex drive design, allowing for unobstructed operation in tight spaces
• Broad compatibility with UNC coarse threads for quick assembly and disassembly in general-purpose applications
• Regulatory peace of mind with full compliance to ASME B18.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

This 6-32 UNC set screw is engineered to solve critical fastening challenges in demanding environments. The 316 Stainless Steel material offers exceptional resistance to chemicals, saltwater, and oxidation, making it perfect for marine equipment, chemical processing, and outdoor machinery. The hex headless design and cone point provide a flush finish and deep penetration into shafts or hubs, preventing slippage and maintaining alignment in high-vibration systems like motors, pulleys, and precision instruments. With coarse thread spacing and Class 3A fit, it ensures quick, secure installation without cross-threading, reducing downtime in assembly lines. Ideal for securing collars, gears, and knobs, this set screw delivers long-term reliability where corrosion and loosening are common concerns.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications, with precise UNC thread form, Class 3A thread fit for tight tolerances, and a 1/4" length. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free of hazardous substances. The right-hand thread with coarse spacing and 90° cone point angle is manufactured to deliver consistent performance in industrial applications.