S-90291A865 5/16"-24 ASME B18.3 Set Screws
Set Screws
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Basic Information
Head Parameters
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Superior vibration resistance with a durable green nylon 6/6 tip that prevents loosening under dynamic loads
- Excellent corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise thread engagement with UNF Class 3A fine threads ensuring secure, reliable fastening in critical applications
- Wide temperature tolerance with nylon tip performing reliably from -50° to 250°F (-45° to 121°C)
- Enhanced installation control through 5/32" hex drive design allowing for consistent torque application
- Long-term durability supported by Rockwell B80 hardness for maintained performance under repeated use
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations including RoHS 3 & REACH
Professional Applications & Engineering Value
This 5/16"-24 UNF Class 3A nylon tip set screw delivers exceptional engineering value in applications where vibration-induced loosening compromises assembly integrity. The 18-8 stainless steel construction provides inherent corrosion resistance for demanding environments, while the green nylon 6/6 tip creates positive locking action without damaging shaft surfaces. The fine UNF threads with Class 3A fit ensure precise engagement in machinery, automotive components, and precision instruments. The hex headless design with 5/32" drive facilitates flush mounting in confined spaces while maintaining high torque capability. These features collectively address critical industrial fastening challenges where reliability, surface protection, and vibration resistance are paramount.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with UNF Class 3A thread fit ensuring precision dimensional accuracy. The set screw features right-hand fine threads (24 TPI) with 0.313" diameter and incorporates a 0.094" long nylon 6/6 tip with 0.188" diameter. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming suitability for global industrial applications requiring restricted substance control.
