S-90289A587 5/16"-18 x 1 1/2" 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, extending service life in harsh industrial environments
- Exceptional holding power from Class 3A thread fit, ensuring vibration-resistant fastening in high-stress applications
- Optimized torque transmission through 5/32" hex drive design, preventing tool slippage during installation
- Enhanced grip strength with cup point tip and serrations, creating permanent seating on shafts and components
- Reliable mechanical performance from Rockwell C45 hardness, maintaining dimensional stability under heavy loads
- Simplified inventory management with standardized 5/16"-18 UNC coarse threads compatible with common industrial components
- Headless configuration enabling flush mounting in space-constrained assemblies
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering solutions for industrial equipment requiring permanent shaft positioning and component retention. The UNC Class 3A thread specification provides precise mechanical engagement that resists loosening under continuous vibration, making it ideal for power transmission systems, motor mounts, and machinery assemblies. The cup point design with serrations bites deeply into contact surfaces, creating reliable anti-rotation security without damaging precision shafts. With Rockwell C45 hardness and corrosion-resistant coating, these hex drive set screws maintain clamping force integrity in demanding environments including manufacturing equipment, automotive systems, and heavy machinery where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
Manufactured to ASME B18.3 standards with Class 3A thread fit for precision tolerance in inch measurements. Features 5/16"-18 UNC coarse threads with right-hand direction and 1½" length. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
