Eli5 How come auto repair garages don’t keep spare car parts on site and have to order them?

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I’d understand them not keeping spares of larger parts at the garages due to space issues, but I’m confused they wouldn’t have something like spare O-rings around (one is stopping my car from getting fixed/tested and the garage told me there’s been a shipping delay).

In: Engineering

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Anonymous 0 Comments

I know your frustration. My car once sat for two weeks waiting for O-rings because those particular O-rings are made of a special material, viton, and you can’t just use any old O-ring. I have an O-ring assortment kit in my shop, but I regularly have to go get a different one because the particular thickness is not in the kit.

[What an O-ring assortment looks like](https://newcontent.westmarine.com/content/images/catalog/1500/20216602_1500.02022021090008.jpg)

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