Qualcast Stainless Steel Expansion Plug

The Qualcast Stainless Steel Expansion Plug line gives you a corrosion-resistant freeze plug (also called a core plug, welch plug or engine block expansion plug) for sealing the casting holes in engine blocks and cylinder heads. Stainless steel construction suits marine, performance and heavy-duty engine builds.

Key Features:

• Stainless steel construction resists rust and corrosion from coolant, moisture and salt-water exposure
• Cup-style design expands to seal tightly in the casting bore
• Suited to marine, performance and heavy-duty applications, where Qualcast recommends brass or stainless materials
• Made from high-quality material by Qualcast, a brand known for a wide range of expansion plug designs

Use these plugs when rebuilding or refreshing an engine. Stainless steel is a durable alternative to standard steel plugs, particularly where long service life matters.