S-92771A471 4-40 Thumb Nuts
Thumb Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
Geometric Parameters
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Key Features & Benefits at a Glance
- Tool-free installation and adjustment with easy-grip wing design for rapid manual tightening in confined spaces
- Superior corrosion resistance from high-quality brass construction, ensuring long-term reliability in humid or demanding environments
- Precision thread engagement with Class 2B fit for smooth assembly and reduced risk of cross-threading
- Optimized strength and durability through coarse 4-40 UNC threading that resists vibration loosening
- Wide compatibility with standard inch-system components thanks to 21/64" base diameter and right-hand threading
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
- Ergonomic handling comfort with 3/4" width providing secure grip during repeated adjustments
Professional Applications & Engineering Value
This brass thumb nut delivers exceptional value in applications requiring frequent adjustments or tool-free maintenance. The 4-40 UNC coarse thread configuration provides excellent resistance to vibration-induced loosening while maintaining quick assembly times. Engineers specify this component for electrical enclosures, instrumentation panels, and machinery guards where corrosion resistance is critical. The standard wing nut profile offers reliable hand-tightening capability in space-constrained installations, eliminating the need for specialized tools. The Class 2B thread fit ensures consistent performance across high-cycle applications while the right-hand thread direction maintains compatibility with standard industrial components.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2B thread fit tolerance for optimal performance. Thread specifications conform to UNC coarse thread standards with 4-40 sizing. Full compliance with RoHS 3 (2015/863/EU) including exemption 6(a)-I for lead as alloying element, and REACH (EC 1907/2006) regulations regarding SVHC substances. Base diameter measures 21/64" with 3/4" width across wings and 3/8" height.
