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Old 08-24-2020, 09:20 PM   #10
DeadheadNM
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Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,485
Re: 12 Bolt Fill Plug

I believe the fitting for a posi axle is an “outie” like shown whereas the non-posi axles use an “innie” and these styles are not interchangeable as the threads differ. Here are example posi fittings and these have the shoulder to retain the posi tag.
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Last edited by DeadheadNM; 08-24-2020 at 09:21 PM. Reason: Corrected
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