Redline Bottle Thread Adapter
thingiverse
Redline oil containers don't use the same threads that every one else does. If you use a regularly-available pump for filling gear oil or transmission fluid it will leak all over the place and generally be annoying. This adapts the Redline threads to the threads that everyone else seems to use. It is not perfect but it worked for me and I didn't see anything like this out there.
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