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Firewall fitting

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Mac Transtrum

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I need to run a couple vent lines (oil tank to engine) through the firewall . It is 5/8 inch mil6000 hose and is just a vent line so no pressure , but trying to find a clean way to pass through the firewall. I see a bunch of AN bulkhead fittings , but no bulkhead hose fittings. Tempted to slide the hose over an AN fitting and secure with a hose clamp. Any better ideas out there?
Thanks! Mac
 

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