Looks like KF to me.
Download the fittingscatalog from www.precisionplus.com:
http://www.precisionplus.com/ECatalog/P+%20Low%20Cost%20Vacuum%20Fittings.zip (http://www.precisionplus.com/ECatalog/P+%20Low%20Cost%20Vacuum%20Fittings.zip)
The name is KF. And yes there are adapters available, I had the same fittings on my Leybold pump. Precisionplus says theirs are low-cost. I don´t want to know what these parts cost if "not-low-cost" purchased. If you know somebody with equipment for metalworks you will get it cheaper from him and have to buy "only" the seals. Take the VITON seals.
I don´t regard this as source - if the moderation doesn´t agree i will edit my post.
ORG