USMC Pneumatic riveter

[h~moto]

Is anyone familiar with a pneumatic riveter made by the United Shoe Machinery Company? I just acquired one and I am trying to figure out what the maximum psi is. The listed maximum psi was either worn off the label or it was never stamped. It is a model 92844.

 

[four.cycle]

USMC thread

I don't believe we've seen one of those here.