Qualcast Engine Expansion Plug Kit Brass Freeze Plug

Qualcast brass freeze plugs, also called engine expansion plugs, core plugs or frost plugs, seal the casting holes in engine blocks and cylinder heads. Brass resists corrosion, so these plugs are a good choice when you rebuild or refresh an engine.

Key Features:

• Brass construction: It resists rust and corrosion in coolant passages. Qualcast recommends brass or stainless steel for marine, performance and heavy-duty use.
• Cup-style design: The plug expands against the bore to form a tight, leak-resistant seal in the block.
• Wide product line: Qualcast offers its expansion plugs in several cup designs, including standard, shallow and concave. Metric and fractional sizing are both available.
• Made in the USA: Qualcast is a U.S. brand, and customers often comment on the plugs' finish and fit.

Use these plugs when you replace worn or rusted factory plugs, rebuild an engine, or have a block machined. Pick the child item that matches the hole size and cup style you need.