1-3/4" Cup Expansion Plugs – Package Quantity • 25
1-3/4" Cup Expansion Plugs • Core (Expansion Plugs) plugs are used to fill the sand casting core holes found on water-cooled internal combustion engines. They are also commonly called frost plugs, freeze plugs, or engine block expansion plugs.
- Type : Cup
- Size : 1-3/4"
- Finish : Zinc