S-92088A135 4-40 Thumb Nuts

Key Features & Benefits at a Glance

• Enhanced grip and torque application with knurled round head design for secure finger-tightening without tools
• Superior corrosion resistance from Black Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Reliable coarse threading with 4-40 UNC and Class 2B fit for quick assembly and vibration resistance
• Optimized dimensions including 1/2" head diameter and 5/8" height for comfortable handling and space efficiency
• Partial threading design ensures precise engagement and prevents cross-threading in repetitive applications
• Compliance with global standards including REACH and RoHS 3 for safe use in regulated industries
• Right-hand thread direction for intuitive installation compatible with standard industrial components

Professional Applications & Engineering Value

This 4-40 UNC thumb nut delivers exceptional performance in applications requiring frequent adjustments or tool-free maintenance. The Black Oxide 18-8 Stainless Steel material provides excellent corrosion resistance, extending service life in humid or chemically exposed settings like electrical enclosures, machinery guards, and automotive assemblies. The knurled round head offers superior tactile control, reducing installation time and minimizing slippage during hand-tightening. With its coarse thread spacing and Class 2B thread fit, it ensures reliable engagement in vibration-prone environments, making it ideal for securing panels, fixtures, and access points where durability and user convenience are critical.

Specification Summary & Compliance

This thumb nut features a 4-40 UNC coarse thread with Class 2B thread fit for consistent dimensional accuracy. It is manufactured from Black Oxide 18-8 Stainless Steel with a standard profile, partially threaded design, and right-hand thread direction. The product complies with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) regulations, ensuring adherence to industrial safety and environmental standards.