Hand pump adapter

I have a problem and I could use some advice. I recently purchased a 4500 PSI Hand Pump from Ebay to use with my new Weihrauch HW100 KT. The fill probe for the rifle has 1/8 inch male thread and it will not connect to the 8 mm female quick connector that came with the air pump . I've been to several stores and have been unable to find a compressed air fitting that can connect the two. Can anyone inform me of the correct name for the fitting that I need, and where I can get one? Thank you very much. I really appreciate any help you can provide. 
 
If this looks like the adapter that you're looking for:
1547779860_15895414065c413f14062743.46371194_1_8 BSPP adapter.jpg

It is an 1/8" BSPP [specific thread type] female-thread / male-adapter.
I have used these exact same adapters, and they work perfectly!

Here's the link to where I grabbed all of mine: 

https://www.amazon.com/IORMAN-Universal-Quick-Disconnect-Paintball-Fittings/dp/B07HKY3N26/ref=sr_1_11?ie=UTF8&qid=1547779717&sr=8-11&keywords=1%2F8+bspp+male+quick+connect

Sam -