S-90289A162 6-40 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior holding power with Class 3A thread fit and serrations locking for reliable, vibration-resistant fastening in demanding applications.
• Enhanced durability and corrosion resistance thanks to the black-oxide finish on alloy steel, extending service life in harsh industrial environments.
• High-strength performance with Rockwell C45 hardness, ensuring the set screw maintains its shape and function under high stress.
• Secure and precise installation using the 1/16" hex drive, allowing for high torque application without slippage in confined spaces.
• Optimal grip and minimal surface damage from the cup tip design, providing concentrated contact pressure for secure component positioning.
• Consistent and reliable threading with 6-40 UNF fine threads, offering improved adjustment accuracy and resistance to loosening.
• Broad compliance and safety meeting ASME B18.3 standards, RoHS 3, and REACH regulations for use in global markets and sensitive applications.

Professional Applications & Engineering Value

This 6-40 UNF Class 3A set screw is engineered to address common industrial challenges such as component slippage and vibration-induced loosening. Constructed from black-oxide alloy steel, it offers excellent resistance to wear and environmental factors, making it ideal for machinery, automotive assemblies, and precision equipment. The fine thread spacing and right-hand thread direction ensure tight, secure fits in critical applications, while the headless design with hex drive allows for flush mounting in space-constrained areas. Its cup tip type concentrates force effectively, reducing the risk of damage to secured parts. By incorporating serrations for locking, it provides added security against rotational forces, delivering reliable performance in dynamic operational conditions.

Specification Summary & Compliance

This set screw features a Class 3A thread fit for precise dimensional accuracy and tight tolerances, adhering to UNF thread standards. It is manufactured in compliance with ASME B18.3 specifications, ensuring consistency and reliability. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in products requiring strict material safety and sustainability standards.