S-92845A007 4-40 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 or humid industrial environments.
• Exceptional holding power ensured by the Class 3A thread fit, providing tighter tolerances for secure, vibration-resistant fastening.
• High-strength durability from Rockwell B80 hardness, offering reliable performance under mechanical stress.
• Easy and secure installation with the 0.050" hex drive, allowing for high torque application without slipping.
• Enhanced grip and alignment due to the extended tip design, improving contact and preventing component movement.
• Broad compatibility with UNC coarse threads, facilitating quick assembly and disassembly in various applications.
• Compliance with major standards including ASME B18.3, RoHS, and REACH, ensuring quality, safety, and environmental responsibility.

Professional Applications & Engineering Value

This 4-40 UNC set screw in 316 Stainless Steel is engineered to address critical challenges in precision assemblies, such as securing collars, gears, and pulleys on shafts. Its headless design and hex drive allow for flush mounting and high-torque installation in confined spaces, reducing the risk of interference. The extended tip increases surface contact, enhancing grip and preventing loosening under vibration, a common issue in machinery and automotive components. With coarse threads and Class 3A thread fit, it ensures quick, reliable fastening while maintaining alignment in dynamic environments. Ideal for industries like aerospace, marine, and manufacturing, this screw offers long-term reliability by resisting corrosion and wear, minimizing maintenance needs and downtime.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading. It meets ASME B18.3 specifications for consistency and performance. Environmental compliance is assured through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from hazardous substances. Additional features include a right-hand thread direction, 1/4" length, and extended tip dimensions with specified tolerances for tip length and diameter, ensuring reliable integration in professional applications.