S-92891A101 4-40 Square Nuts
Square Nuts
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Basic Information
Dimension Parameters
Thread Parameters
Head Parameters
Material & Strength Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
- Reliable coarse thread engagement with UNC threads for faster assembly and reduced cross-threading risk in industrial applications.
- Precise Class 2B thread fit ensures smooth mating with male threads, minimizing binding and ensuring consistent clamping force.
- Secure external square drive provides excellent grip for wrenches, preventing slippage during high-torque installation.
- Compact 1/4" width and 3/32" height offers a space-saving design for applications with limited clearance.
- Full regulatory compliance with RoHS 3 and REACH standards, ensuring safety and environmental responsibility for global supply chains.
- Right-hand thread direction delivers standard, intuitive installation for efficient maintenance and assembly line operations.
Professional Applications & Engineering Value
This 4-40 UNC Square Nut in 316 Stainless Steel is engineered to solve critical challenges in demanding sectors like chemical processing, marine, and food equipment. Its exceptional corrosion resistance prevents degradation from moisture, chemicals, and salts, ensuring long-term integrity where carbon steel fails. The coarse UNC thread and Class 2B fit provide rapid, reliable assembly, reducing installation time and the risk of thread damage in high-vibration environments. The external square drive allows for secure wrenching in tight spaces, making it a robust choice for machinery, frames, and structural assemblies requiring dependable, maintenance-free fastening solutions.
Specification Summary & Compliance
This square nut adheres to UNC coarse thread standards with a Class 2B thread fit for consistent dimensional accuracy. Manufactured to inch system specifications with a width of 1/4" and height of 3/32". It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting stringent environmental and safety requirements for industrial components.
