Bought a new sensor assembly from Temu and did not know it would not fit U.S. light housings. Temu's sensor has 16mm threads and all of my housings have 21mm thread holes. This adapter fits tightly on the sensor and extends sensor length about 20mm, Due to some stringing on the inside thread that makes it tight there are flats on the barrel for an adjustable wrench. I used PETG since it will be outside. I used 4 walls for strength.

If you need a threaded plug, I previously uploaded one. Look for Security Light Screw in Plug. (For some reason this website thought the link to the plug on this website was spam or inappropriate.)???