I know that the Yugo M48 Mausers have a slightly shorter length action than the K98 Large rings ... I don't know if a Yugo bolt will fit in a K98 or not ... they look pretty much the same, but I've never tried it. 170 mils is an awful lot ... I think that the M48's are only .25" (250 mils) shorter and it may not all be on one end of the bolt ...
Where did this rifle come from?
Where was it made?
What year of manufacture?
When you go to take more pictures, you should make sure that you include as fine a ruler as you can in the picture so that we can compare it ... I know that many of the Turks that I've seen and taken apart, appear to have been assembled from miscellaneous parts ... so I wouldn't declare it impossible that you have the wrong bolt in this rifle ... now I'm really on the "DON'T EVEN THINK OF FIRING THIS THING!!!" bandwagon.
Saands