S-90778A450 1/4"-28 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction, ideal for marine, chemical, and outdoor applications.
• Precise and secure fastening with a Class 3A thread fit, ensuring tight tolerances and reliable performance in high-vibration assemblies.
• Excellent drive torque transmission from the 1/8" hex drive, allowing for easy installation and removal with standard tools.
• Enhanced grip and component positioning from the 118° cone point, which bites into the shaft for a non-slip, permanent hold.
• Consistent mechanical strength with a Rockwell B80 hardness, providing durability and resistance to wear over time.
• Reliable fine thread engagement with UNF 1/4"-28 threading, offering more threads per inch for a stronger hold in thin materials.
• Headless, flush-mount design for applications where a protruding fastener is not permissible, saving space and improving safety.

Professional Applications & Engineering Value

This 316 stainless steel set screw is engineered to address critical challenges in industrial settings, such as corrosion from chemicals, moisture, and salt spray. The UNF fine thread and Class 3A fit provide exceptional precision, reducing the risk of loosening in high-vibration machinery like motors, pumps, and conveyor systems. The cone point with a 118° angle ensures maximum bite into shafts and collars, preventing slippage and maintaining alignment in precision equipment. Its headless, hex drive design allows for compact assembly in tight spaces, making it a reliable choice for securing gears, pulleys, and other components in manufacturing, automotive, and aerospace applications where durability and compliance are paramount.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with a Class 3A thread fit for high precision. It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets stringent environmental and safety regulations for industrial use.