S-90876A355 5/16"-18 Thumb Nuts

Key Features & Benefits at a Glance

• Superior hand-tightening capability with 1 3/8" width wings for maximum grip and faster assembly without tools
• Enhanced durability and corrosion resistance through high-quality steel construction for long service life in demanding environments
• Reliable thread engagement with Class 2B fit ensuring consistent performance and reduced cross-threading risks
• Wide compatibility with 5/16"-18 UNC coarse threads, making it ideal for various industrial assemblies
• Optimized torque transmission from the standard wing nut profile, providing secure fastening under vibration
• Easy installation and removal thanks to the right-hand thread direction and ergonomic wing design
• Precise dimensional accuracy with 15/32" base diameter and 5/8" height for consistent fit in assembly applications

Professional Applications & Engineering Value

This heavy-duty steel thumb nut is engineered to address common challenges in mechanical assembly, such as the need for quick, tool-free adjustments in tight spaces. The UNC coarse thread design and Class 2B thread fit ensure reliable performance in high-vibration environments, reducing the risk of loosening over time. Made from robust steel material, it offers excellent strength and resistance to wear, making it suitable for applications in machinery, automotive, and industrial equipment where frequent maintenance is required. The standard wing nut profile and generous 1 3/8" width provide an ergonomic grip, enabling operators to achieve sufficient clamping force by hand, thereby speeding up assembly lines and reducing labor costs. Its right-hand thread direction and coarse spacing further simplify installation, ensuring compatibility with a wide range of inch-system components.

Specification Summary & Compliance

This thumb nut adheres to UNC thread standards with a 5/16"-18 coarse thread and Class 2B thread fit for precise dimensional accuracy and interchangeability. Manufactured in accordance with common industrial specifications for inch-system fasteners, it ensures consistent performance in mechanical assemblies. The product is designed to meet general industry requirements for durability and fit, supporting efficient and reliable fastening solutions in various sectors.