Radiator cap assembly for 939 series?

[1 Patriot-of-many]

Looking for the radiator cap assembly(spring, gasket and lower/upper cap). Where can I get the entire assembly? I can only find the cap looking online.

 

[doghead]

Nsn?

 

[juanprado]

The cap is a common HD part at napa or a truck supply. Bring them the cap and they should be able to match it. I don't recall the psi off hand - I think 10-12 psi and I believe it has 2 gaskets for the coolant recovery but again it is not in front of me. It is a one piece cap assembly. Parts are not available individually.

 

[1 Patriot-of-many]

Found one on ebay with the same part# though this one is listed for a M809.