Dorman 555-028 Steel Cup Expansion Plug 1-1/2 Inch – 10 Pack, Height 0.480, Direct Replacement For Select Models

Need to seal up an engine block or other component? These Dorman steel cup expansion plugs (often called freeze plugs) are a reliable, direct-fit solution. Each plug is 1-1/2 inches in diameter with a height of 0.480 inches, designed to match OEM specifications for various vehicles and machinery. Made from sturdy steel, they press into place to create a tight, leak-proof seal. This 10-pack gives you plenty for multiple repairs or to keep extras on hand. Dorman includes engineering enhancements for better performance and backs them with a limited lifetime warranty. Installation usually requires a driver or socket that matches the plug size—tap it in evenly until it’s flush. Great for engine rebuilds, coolant system repairs, or industrial applications. If you’re dealing with a leaking freeze plug, these are the affordable, quality replacements you need. Fix it right and keep things dry.