S-90289A123 5-40 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 coating for extended service life in demanding industrial environments
- Exceptional holding power achieved through Class 3A thread fit precision and serrations locking mechanism
- High-strength durability from alloy steel construction with Rockwell C45 hardness rating
- Space-saving design with headless configuration ideal for compact assemblies and tight clearances
- Quick installation using standard 1/16" hex drive tools for efficient assembly operations
- Secure fastening performance with cup tip design that provides concentrated contact pressure
- Industry compliance assurance meeting ASME B18.3 standards and environmental regulations
Professional Applications & Engineering Value
This 5-40 UNC set screw delivers critical engineering solutions for industrial applications requiring precise component positioning and permanent fastening. The black-oxide alloy steel construction provides excellent corrosion resistance while maintaining the Rockwell C45 hardness needed for high-stress environments. The headless design with 1/16" hex drive allows installation in confined spaces where traditional fasteners cannot operate. The coarse UNC threads combined with Class 3A thread fit ensure superior engagement and vibration resistance, while the serrations locking type and cup tip create permanent, slip-resistant connections in shafts, collars, and pulleys. These features make it ideal for precision machinery, automotive components, and industrial equipment where reliability is paramount.
Specification Summary & Compliance
This set screw features precise 5-40 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. The fastener meets ASME B18.3 manufacturing specifications and maintains compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. With a thread diameter of 0.125" and length of 3/16", the screw incorporates right-hand thread direction and hex drive size of 1/16" for standardized installation procedures across industrial applications.
