S-95289A111 4-40 x 3/16" 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 long-term reliability.
• Maximum holding power and vibration resistance ensured by the Class 3A thread fit and coarse UNC thread spacing.
• Easy and secure installation with the hex drive design, preventing cam-out and allowing for high torque application.
• Enhanced grip and positioning provided by the extended tip, improving component alignment and preventing loosening.
• Consistent performance and durability backed by Rockwell B80 hardness, resisting wear and deformation under load.
• Wide industrial compatibility due to compliance with ASME B18.3 standards and headless design for space-constrained applications.
• Safe and environmentally responsible manufacturing, meeting RoHS 3 and REACH regulations for global use.

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address critical challenges in precision assembly and machinery. Its 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as marine equipment, food processing machinery, and outdoor industrial devices. The hex drive and extended tip design ensure a firm grip and precise positioning, reducing the risk of component slippage and maintaining alignment in dynamic systems. With a Class 3A thread fit and coarse thread spacing, it provides reliable fastening in high-vibration settings, from automotive parts to electronic enclosures, enhancing overall system integrity and reducing maintenance needs.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and consistent performance. It conforms to ASME B18.3 specifications, ensuring reliability in industrial applications. The product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally conscious procurement. Thread details follow UNC coarse spacing with a right-hand direction, and the extended tip features controlled tolerances for diameter and length to guarantee fit and function.