12AN アルミニウムクラッシュワッシャー（10個入り）

Used a couple of these on my fuel line fittings and they squished down evenly without tearing, which is exactly what I need for a clean seal. Having ten in the pack means I won’t have to reorder for a while, and they feel solidly machined for the price.

These crushed perfectly under the wrench and sealed my 12AN fittings on the first try, no leaks at all. Having ten in the pack means I’ve got spares for the next project, which is always a win.

I needed to seal up my fuel system and these crush washers did the trick on the first try, no leaks at all. The aluminum material deforms just right under torque to create a tight seal.