S-90876A155 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Quick manual installation and removal without tools due to large 1 1/2" wide wings for superior grip
• Reliable thread engagement with 5/16"-18 UNC coarse threads and Class 2B fit for smooth, secure fastening
• Durable, long-lasting performance from sturdy steel construction that resists wear in industrial environments
• Wide compatibility with standard 5/16"-18 UNC male threads, ensuring easy integration into existing assemblies
• Stable seating and alignment provided by the 1/2" base diameter for consistent application performance
• Efficient for high-use applications with right-hand thread direction, suitable for common assembly and disassembly needs

Professional Applications & Engineering Value

This heavy-duty steel thumb nut is engineered to solve common challenges in industrial settings where speed and reliability are critical. The wing nut profile and coarse UNC threads allow for rapid manual tightening and loosening, reducing downtime in maintenance and assembly lines. Made from robust steel, it withstands repeated use without stripping, while the Class 2B thread fit ensures consistent, vibration-resistant connections in machinery, equipment panels, and fixtures. Ideal for applications requiring frequent adjustments, this thumb nut enhances productivity by eliminating the need for tools in quick fastening tasks.

Specification Summary & Compliance

This thumb nut features precise UNC coarse threads (5/16"-18) with a Class 2B fit for accurate thread engagement and right-hand direction. Dimensions include a base diameter of 1/2", width of 1 1/2", and height of 3/4". Manufactured to standard industrial specifications, it complies with common requirements for UNC thread standards and is suitable for use in regulated environments, though specific certifications like RoHS or REACH should be verified per batch.