What is this thing?

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Metal, about 1 inch in diameter (i.imgur.com)

submitted 1 year ago by ultimike to c/whatisthisthing

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[–] ultimike 2 points 1 year ago (1 children)

The lid screws in.

There are three holes equidistant around the perimeter. They do not go all the way through.

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[–] Brunbrun6766 4 points 1 year ago

Really? Then my guess is those may be for a tool to hook into for turning. All in all it looks like something pressure line or liquid line related

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