S-92845A742 1/4"-28 x 5/8" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Precise, secure fastening ensured by Class 3A thread fit, minimizing backlash and maintaining alignment in critical assemblies.
• Enhanced torque transmission and strip resistance from the 1/8" hex drive, allowing for high installation torque with common tools.
• Reliable component positioning thanks to the extended tip design, which provides positive engagement and reduces workpiece damage.
• Consistent mechanical performance with Rockwell B80 hardness, offering a balance of strength and durability for repeated use.
• Broad industrial compatibility through compliance with ASME B18.3 standards, ensuring interchangeability and reliability.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making it suitable for global supply chains.

Professional Applications & Engineering Value

This 1/4"-28 UNF Class 3A set screw is engineered to address common challenges in precision machinery, automotive, and electronics assembly. The 18-8 Stainless Steel material provides excellent resistance to rust and oxidation, reducing maintenance in humid or corrosive settings. Its fine thread and Class 3A fit deliver tight tolerances, preventing loosening under vibration—a critical factor for motors, shafts, and adjustable components. The headless design with a hex drive allows for flush installation in confined spaces, while the extended tip ensures firm contact without marring surfaces. By meeting ASME B18.3 specifications, it guarantees consistency and reliability in high-stakes industrial applications, from conveyor systems to precision instruments.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF fine thread with Class 3A fit for high precision, and dimensions include a 5/8" length, 1/8" hex drive, and extended tip (diameter 0.156" with specified tolerances). It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B80. Compliance includes ASME B18.3 for dimensional standards, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety, ensuring it meets rigorous industrial and regulatory requirements.