Brno ZKK 600 thread size

[Cleoo1]

Looking for some info on barrel/action thread size dimensions on a Brno ZKK 600.
Also is the Brno ZKK 600 action a large or small ring mauser?

 

[guntech]

Looking for some info on barrel/action thread size dimensions on a Brno ZKK 600.
Also is the Brno ZKK 600 action a large or small ring mauser?

I don't believe it is either of the Mauser threads.. which are 12 tpi.
I have a hunch it is metric (2.0) very close to 13 tpi...

 

[Mauser98]

I'm pretty sure the Brno barrel threads are 28mm x 2mm. Very close to Mauser 98 large ring which are 1.1" X 12 tpi(27.94 X 2.12)

 

[Cleoo1]

If the treads are very close, would a action truing tool with a 1.1"x12 tread on OK to a ZKK 600 action?

 

[guntech]

If the treads are very close, would a action truing tool with a 1.1"x12 tread on OK to a ZKK 600 action?

No.

Yes if you don't care about butchering it...

 

[Leeper]

As pointed out, the threads are metric. If one is unable to cut metric threads, he probably should leave gunsmithing alone. The thread works out to about 12.7 tpi and it is possible to cut a 13 tpi threadto the required minor diameter then grease the threads and force it on and I knew a guy who did just that. It worked out ok but, let's face it, it's a half assed approach.

 

[gstprecision]

Any reason you want to spend that amount of money to true this action? It is a nice action but if you are just rebarelling I would not spend the time and money to true the threads.

 

[Cleoo1]

Original question was to know what Brno action thread size is. I will be Contacting PTG to see if they have a Action trueing kit that will thread into a 22x2.0 metric thread. It doesn't appear the tool they list will thread in.

 

[guntech]

Buying tooling to true a zzk600 action is a huge waste of money..

 

[8x68]

Looking for some info on barrel/action thread size dimensions on a Brno ZKK 600.
Also is the Brno ZKK 600 action a large or small ring mauser?

Picture is from: Bolt Action Rifles Revised Edition by Frank de Haas.

 

[gstprecision]

Buying tooling to true a zzk600 action is a huge waste of money..

I agree with guntech. Chasing or truing threads is generally not worth the money. You will never end up with a top quality action. A good barrel and chambering will be as good as it gets fir this rifle.

Just my opinion.

GST

 

[guntech]

Picture is from: Bolt Action Rifles Revised Edition by Frank de Haas.

Nice picture but it has nothing to do with a Brno ZZK 600 action.

 

[8x68]

He was inquiring about thread size. This gives him an idea of tpi.
Since the ZKK actions are a much improved K98 action it gives him an idea of what to look for. I don't have a pic of the small ring version. I believe the receiver size is 1.3"
But as you all have mentioned there is no point in butchering the action.

 

[AP]

Zkk and M98 have many 'seeming' similarities but they are completely different actions...they may have a external 'mauser' style extractor but then so does a Winchester Model 70, Springfield '03 and a Newton....as well as a Mauser M96. And the similarity stops pretty much there.