Is it posible to mount Praktica B-Mount lens on a Pentax K1000?

The bayonet mounts are incredible similar and he lens fits the camera it just won't turn, there isn't enough clearance. What should i do?

They don't fit.

I would simply get a used K-mount lens--there's plenty of them available used, and in many different names. K-mount lenses were made by Pentax, Takumar (Pentax-made), Vivitar, Soligor, Tamron, Sears, Ricoh, etc.

You shouldn't have any trouble finding a good lens for a low price.

EDIT: One thought, but you'd definitely lose metering: You can get a screw-mount adapter for the B-mount, then a K-mount to screw mount adapter. However, this is an awkward fix and you'd definitely lose metering. I think you're better off just buying the right K-mount lens.

They are very similar, but not quite the same. A quick search turns up this same question but no real answers except that the Praktica mount only fits Praktica cameras. It *may* be possible to modify the lens to fit, but I think you'd be better off selling the Praktica (assuming you have no other use for it) to someone who can use it without mods and picking up a Pentax lens. Or pick up a Praktica as a second body. They're neat manual cameras and often cheaper than the more well known K1000.