S-90669A578 5/16"-18 x 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
- Secure component positioning with a brass soft tip that prevents surface damage while maintaining firm grip
- Exceptional corrosion resistance from 18-8 stainless steel construction for long-term reliability in harsh environments
- Precise torque transmission through 5/32" hex drive design ensuring consistent installation force
- Superior thread engagement with UNC Class 3A fit providing vibration-resistant fastening in demanding applications
- Optimized installation efficiency using coarse thread spacing for quicker assembly in industrial settings
- Enhanced durability with Rockwell B80 hardness maintaining structural integrity under repeated use
- Regulatory compliance assurance meeting ASME B18.3 specifications for quality and performance standards
Professional Applications & Engineering Value
This 5/16"-18 UNC Class 3A set screw delivers critical engineering solutions for industrial assembly challenges. The 18-8 stainless steel construction provides excellent corrosion resistance in manufacturing environments exposed to moisture or chemicals, while the brass soft tip prevents marring of precision components in machinery alignment applications. The headless hex design allows for flush mounting in confined spaces, making it ideal for securing collars, gears, and pulleys on rotating shafts. With its Class 3A thread fit and coarse UNC threading, this fastener maintains secure positioning even under vibration-intensive operations in automotive, aerospace, and heavy equipment applications. The combination of Rockwell B80 hardness and precise manufacturing ensures consistent performance in high-cycle production environments.
Specification Summary & Compliance
This set screw maintains Class 3A thread tolerance for precise fitment and features UNC coarse threading (5/16"-18) with right-hand direction. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance standards. The product is fully RoHS 3 (2015/863/EU) compliant and meets REACH (EC 1907/2006) requirements for environmental safety and substance restrictions.
