Mystery Part ??

[danf19]

I purchased these with other parts and thought they were for a JD or VL. Now not sure ...Can anyone help me out please ???
thanks
Dan

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[exeric]

Dan, those a J era, Harley-Davidson oil tank check valves.

[Robert Luland]

The two end ones are early and center late. The factory's first attempt at making die cast **** and they succeeded at it with this one. Bob L

[MMasa]

Not sure what Bob is talking about but those are all the same part. 1915-1926 hand oil pump check valves. The typical failure point is the thin section at the hex end where the fitting screws in. They tend to split there if the fitting is overtightened.
If in usable condition, they are a relatively hard part to find. Repops made of brass are now available.
Mark