What is the rubber ring on the gauge bolt for?
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What is the rubber ring on the gauge bolt for? Rust prevention or protecting the nut?
I think it’s used to protect the nut...
Prevent collisions and sparks during disassembly! A means of preventing explosions!
It’s used to protect the bolt from damaging the nut during removal, right?
It simply acts as a gasket; it has no special function. This type of contact is better, as it results in more even distribution of forces. Moreover, the intensity can have multiple gradients.