S-92845A739 1/4"-28 x 5/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
• Exceptional holding power and vibration resistance from the Class 3A fine thread fit, ensuring a secure, precise, and reliable connection.
• Maximum component grip and reduced slipping due to the extended tip design, which provides deeper penetration and a more positive lock.
• High-strength durability with a Rockwell B80 hardness, offering excellent resistance to wear and deformation under load.
• Easy and secure installation with a standard 1/8" hex drive, allowing for high torque application in confined, headless designs.
• Guaranteed dimensional precision and interchangeability as it is manufactured to meet the stringent ASME B18.3 standard.
• Safe for use in regulated industries with full compliance to RoHS 3 and REACH environmental directives.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A fine thread set screw is engineered to solve critical challenges in precision assembly and motion control systems. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for applications in food processing, marine, and chemical environments. The headless design and extended tip allow it to sit flush and dig deeply into a shaft or component, effectively preventing axial movement and loosening under high vibration—common in pulleys, gears, and collars. Its right-hand thread and hex drive facilitate straightforward installation with standard tools, ensuring a tight, reliable set every time. This screw delivers consistent performance in demanding industrial set screw applications where precision and long-term reliability are non-negotiable.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with a precision Class 3A thread fit for tight tolerances. Key dimensions include a 5/16" length, a 0.156" tip diameter, and a 1/8" hex drive. It is manufactured in accordance with the ASME B18.3 specification and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets current environmental and safety standards for industrial components.