When you install the Fumoto you have to measure the thickness of the pan where the hole is and cut the threads off the Fumoto to the proper length so that it fits flush inside.
ARE YOU KIDDING ME?
Here are install directions direct from Fumoto:
Installation:
Remove original drain plug and drain oil into acceptable receptacle.
Insert Engine Oil Drain Valve with gasket and tighten. Do not over tighten. (Some oil pans are designed with recessed drain hole which may prevent the valve from being installed properly. If the valve can not be tightened all the way without hitting the oil pan wall, do not install the Drain Valve to your vehicle. Adaptors are available for some models)
Make sure valve is closed and refill crankcase.
Warning:
For users under extreme conditions:
If you are using the Engine Oil Drain Valve on off-road vehicles such as farm tractors and logging equipment under extreme environment (i.e. corn fields, brush areas), it is recommended that a hose clip as shown below be used for extra safety and security. The hose clip, which can be purchased at any hardware stores, will firmly keep the lever in the locked position at all times.