An Expansion Plug, also known as a freeze plug or core plug, is a small, round, or dish-shaped cap that is used to seal the openings. It is made of metal, such as steel, and is used to fit snugly into the openings to prevent coolant or oil from leaking out. It is used to seal the core holes that are created during the casting process. They are also used to provide access for cleaning and maintenance purposes. Attributes:• Withstands the high temperatures and pressures• Resist harsh conditions, including exposure to vibrationApplications:An Expansion Plug acts as a barrier against dust, dirt, moisture, and other environmental elements, protecting the internal parts from damage or contamination.