Does anyone recognize these DC collection fittings?

[Wade Lippman]

I am cleaning up my shop and I found these 4 fittings that I had thrown in a bin over the years. I have no idea what they are for, but am hoping someone will recognize them.

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Assuming they are for routers, I have only owned 3 routers, Bosch 1617, Freud FT3000VCE, and a Freud laminate router. I only have the Bosch now and none of them seem to fit it, though maybe I am not doing it right.
But maybe they are not even for routers. I donno.

Any ideas?

[Jay Yoder]

I am cleaning up my shop and I found these 4 fittings that I had thrown in a bin over the years. I have no idea what they are for, but am hoping someone will recognize them.

267825267826
Assuming they are for routers, I have only owned 3 routers, Bosch 1617, Freud FT3000VCE, and a Freud laminate router. I only have the Bosch now and none of them seem to fit it, though maybe I am not doing it right.
But maybe they are not even for routers. I donno.

Any ideas?
I think two of them at top of LH pic are for Bosch 1617. Not sure about the others...

[Andrew Kertesz]

There is one that is definitely for the Freud FT3000, it is the longer straight one. I have the same router and fitting.

[Wade Lippman]

Okay, looking at the left hand picture;
The one at 1oclock fits the 1617 plunge base. That one is good.
The one at 10oclock fits the 1617 also? It kinda fits some of the holes on the bottom, so maybe that is it.
The one at 5oclock fits the Freud? Okay, I will toss it.

That leaves the one at 8oclock.
Attached are some closeups of that that one.267858267859
I appreciate the help.

[Jason White]

At least 2 of them are for Bosch routers.