S-90291A444 3/8"-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 durable nylon 6/6 plastic tip that maintains secure fastening in high-motion applications
- Excellent corrosion resistance provided by 18-8 stainless steel construction for long-lasting performance in harsh environments
- Precise thread engagement with Class 3A thread fit ensuring tight tolerances and reliable assembly connections
- High torque capability through hex drive design allowing maximum force application without stripping
- Wide temperature compatibility with nylon tip functioning effectively from -50° to 250° F
- Secure non-marring contact from green nylon tip that protects sensitive surfaces while preventing loosening
- Industry-standard compliance meeting ASME B18.3 specifications for guaranteed dimensional accuracy
Professional Applications & Engineering Value
This 3/8"-24 UNF Class 3A hex headless set screw delivers exceptional engineering value in applications requiring vibration-resistant fastening and surface protection. The 18-8 stainless steel construction provides excellent corrosion resistance for harsh industrial environments, while the nylon 6/6 plastic tip creates a secure, non-marring contact point that prevents damage to precision components. The fine thread spacing and Class 3A thread fit ensure precise positioning and reliable clamping force in machinery, automotive assemblies, and electronic enclosures. The hex drive design allows for high-torque installation in confined spaces where headless fasteners are essential, making it ideal for permanent set applications in shafts, collars, and gears where movement-induced loosening must be prevented.
Specification Summary & Compliance
This precision fastener features 3/8"-24 UNF fine threads with Class 3A thread fit for superior dimensional accuracy and tight tolerances. Manufactured to ASME B18.3 standards, the set screw ensures consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety requirements for industrial applications worldwide.
