S-90289A161 6-40 x 3/16" ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with Black-Oxide finish, extending service life in harsh industrial environments.
- Precise, secure fastening thanks to Class 3A thread fit, ensuring minimal backlash and reliable positioning.
- High-strength durability from Alloy Steel with Rockwell C45 hardness, resisting wear and deformation under load.
- Easy installation in confined spaces with compact 1/16" hex drive and headless design.
- Enhanced anti-loosening performance through serrations locking and cup tip for firm grip on shafts.
- Consistent fine thread engagement with 6-40 UNF right-hand threads, ideal for precision adjustments.
- Broad compliance assurance meeting ASME B18.3, RoHS, and REACH for global quality and safety standards.
Professional Applications & Engineering Value
This 6-40 UNF Class 3A set screw is engineered to address critical challenges in precision assembly and motion control systems. The Black-Oxide Alloy Steel construction provides excellent resistance to oxidation and wear, making it suitable for automotive, aerospace, and machinery applications where environmental factors can compromise fastener integrity. Its headless design and 1/16" hex drive allow for flush mounting in tight spaces, while the cup tip and serrations ensure a firm, non-slip hold on rotating components like pulleys and gears. By utilizing fine thread spacing and right-hand thread direction, it delivers precise axial clamping force, reducing the risk of vibration-induced loosening in high-speed operations. This screw is a reliable solution for engineers seeking durability, compliance, and exacting performance in industrial fastening.
Specification Summary & Compliance
This set screw adheres to Class 3A thread fit for high precision in UNF fine threads with a diameter of 0.138" and length of 3/16". It conforms to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material quality for industrial use.
