S-91833A161 1/4"-20 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
- Superior finger-tight control with deep knurled head texture for secure grip even with gloves or oily hands
- Excellent corrosion resistance thanks to 18-8 stainless steel construction for long service life in harsh environments
- Quick installation and adjustment with partially threaded UNC coarse threading that resists cross-threading
- Reliable thread engagement with Class 2B fit ensuring consistent performance in industrial applications
- Optimal hand-tightening comfort from the round head profile with generous 1" diameter and 1/2" collar height
- Compliance with global standards including REACH and RoHS 3 for environmentally responsible manufacturing
- Versatile industrial application with right-hand threading compatible with standard 1/4"-20 UNC fasteners
Professional Applications & Engineering Value
This 18-8 stainless steel thumb nut delivers exceptional value in applications requiring frequent adjustments or tool-free maintenance. The deep knurling pattern provides positive grip in challenging conditions where tools are impractical or access is limited. Engineered with UNC coarse threading and Class 2B thread fit, it ensures reliable engagement while resisting vibration loosening in machinery, electrical enclosures, and production equipment. The corrosion-resistant properties of 18-8 stainless steel make it ideal for food processing, marine, and outdoor applications where moisture and chemicals are present. The partially threaded design allows for smooth hand operation while maintaining secure fastening performance in industrial settings.
Specification Summary & Compliance
This thumb nut features 1/4"-20 UNC coarse threading with Class 2B thread fit for precision engagement. The dimensional specifications include a 1" head diameter, 1/2" collar diameter, 1/2" collar height, and 3/4" total height with partial threading to 1/4" depth. The product is manufactured in compliance with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental standards, ensuring safe use across various industrial applications while meeting international regulatory requirements for hazardous substance restrictions.
