One-third the weight of steel, aluminum nuts resist corrosion in wet environments and are nonmagnetic. The nylon insert grips the bolt to resist loosening without damaging threads. They're reusable, but their holding power lessens with each use.

 

These nuts see photo 2 for detailed dimensions.
The data is a single batch, manual measurement, there are errors!
The color of the photo may have a color difference due to the monitor!

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