Throw it away. It won't open if it should get stuck in the open position! I didn't see that when ordering. I looked at the thermostat and thought it was GREAT because a lot of forums said to do it NOW because it's MUCH EASIER! SO TRUE! My temp never goes above 130F and water flows through the radiator from the first second! Screws are ok. seals too. RUBBER face seals are the best. Thermostat - GARBAGE!