Cummins Thermostat, 3928639

replaces: 3928639, 3901845, 3907242
Gasket or Seal Included No Inside Diameter (Inches) 1.13 Opening Temperature (C) 83 Opening Temperature (F) 180 Outside Diameter (Inches) 1.71
Our thermostats are manufactured with the heavy duty engine applications in mind to ensure proper performance and durability individual to each application.

Some of the features found on our thermostats are:
Stainless steal sleeve withstands corrosion
Sleeve and valve are lapped to offer low leakage
Individual calibration and wax actuators allow for a superior response time