HD Thermostat-170 Degrees Manufactured with OEM quality materials and safety standards by an OE Supplier. Stands up to even the most demanding automotive cooling systems. Manufactured with OEM specifications and processes. Copper case and wax compound assures rapid response to temperature changes in the coolant. Bypass Plate Diameter: 1.41 in Flange Diameter: 2.86 in Flange Diameter (Without Seal): 2.868 in Hardware included: No Height from Flange to Bottom: 2.56 in Jiggle Pin Included: No Flange Thickness: 0.21 IN Gasket Or Seal Included: No Height: 3.05 IN Installation Tool Included: No Jiggle Pin Weep Hole: No Material: Stainless Steel Start to Open Temperature: 170 Deg. F