Config option for default SNAT translation idle timeout?

SNAT translation addresses by default have an 'indefinite' timeout for TCP, UDP, and IP. This can be set on a per-object basis when the new translation address is configured.

Is it possible to configure a 'global' value to apply to any new SNAT translation? I.e.: Set the TCP idle timeout to xxx seconds for new SNAT translation unless explicitly set otherwise?

I checked through some locations (global settings, DB variables) and didn't see anything that appeared to allow this.