Cast Aluminum Expansion Plug Nominal size: 2.5 inches. Lightweight, easy to handle - up to 70% lighter than similar steel plugs. Durable cast aluminum - heavy duty, non-corrosive and maintenance-free; with natural rubber. Fill or Vent - threaded pipe stem has removable cap. Simple to install and work with - wing nut easily expands rubber seal. Special sizes are available to increase expansion plugs range. Plugs are used to create an airtight seal.
- Nominal Size: 2.5 inches , 63.5 mm
- Unexpanded Size: 2.44 inches , 61.98 mm
- Expanded Size: 2.775 inches , 70.485 mm