S-90289A576 5/16"-18 x 3/8" 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
- Enhanced corrosion resistance with black-oxide coating for longer service life in harsh industrial environments
- Superior holding power through serrated locking design that prevents components from loosening under vibration
- Precision Class 3A thread fit ensures tight tolerances and reliable fastening in critical applications
- High-strength alloy steel construction with Rockwell C45 hardness provides exceptional durability and load capacity
- Secure hex drive installation allows for high torque application without slippage or tool damage
- Cup tip design creates concentrated contact pressure for maximum grip on shaft components
- Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for global market acceptance
Professional Applications & Engineering Value
This 5/16"-18 UNC set screw delivers exceptional engineering value in demanding industrial applications where vibration resistance and precise component positioning are critical. The black-oxide alloy steel construction combined with Rockwell C45 hardness provides superior strength against shear forces and environmental degradation. The serrations locking type effectively counters rotational loosening in machinery, power transmission systems, and automotive assemblies. The coarse thread spacing and Class 3A thread fit ensure rapid installation and reliable engagement in production environments. The headless design with hex drive allows for flush mounting in confined spaces while maintaining accessibility for maintenance and adjustments.
Specification Summary & Compliance
This set screw features precision 5/16"-18 UNC coarse threads with Class 3A thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications with Rockwell C45 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global markets. The combination of black-oxide surface treatment and alloy steel material provides optimal performance in industrial fastening applications requiring high strength and corrosion resistance.
