S-90876A660 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Enhanced manual tightening and loosening with standard wing profile for tool-free operation in hard-to-reach areas
• Superior corrosion resistance due to zinc-plated steel construction, extending service life in harsh environments
• Reliable coarse thread engagement with 5/16"-18 UNC threads for quick assembly and reduced cross-threading risks
• Consistent thread fit with Class 2B tolerance ensuring smooth installation and secure fastening
• Robust load distribution from the 7/8" base diameter, providing stable contact surfaces
• Right-hand threading compatibility for standard industrial applications and easy integration
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe, sustainable use

Professional Applications & Engineering Value

This zinc-plated steel thumb nut delivers exceptional performance in demanding industrial applications where frequent adjustments and reliable fastening are critical. The standard wing profile enables quick hand-tightening without tools, reducing downtime in maintenance and assembly lines. Its coarse UNC threads and Class 2B thread fit minimize the risk of stripping and ensure consistent clamping force, even under vibration. The zinc plating offers a protective barrier against moisture and chemicals, making it ideal for outdoor equipment, machinery panels, and electrical enclosures. With a 7/8" base diameter and right-hand thread direction, it provides a secure, wide-bearing surface that distributes pressure evenly, preventing damage to connected components and enhancing overall system durability.

Specification Summary & Compliance

This thumb nut features precise Class 2B thread fit and adheres to UNC thread standards with coarse spacing for 5/16"-18 size. Manufactured from zinc-plated steel in inch measurements, it includes a base diameter of 7/8", width of 1 1/2", and height of 5/8". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for industrial use.