Looking for large expansion plugs.

DFZ · Jul 6, 2016

Looking for a source of large expansion plugs for a large gearbox.
Largest Napa carries is 2 3/4". Need a 3 1/4" plug for the side of this gearbox. If they are larger than the size used in engines do they go by different names? Freeze plugs, expansion plugs? Looked through grainger and McMaster Carr but they don't have anything.

Thanks for any suggestions. ..

1948CaseVAI · Jul 6, 2016

Try freezeplugfactory.com You may have to phone them but the number is on their page.

JK2 · Jul 6, 2016

Dorman has the following concave one listed:
3-1/4"
82.55mm
Steel
3.250"
part # 550-036 (qty 10)

bbrennan · Oct 16, 2016

Did you ever find the expansion plug? I need the same plug (Dorman #550-036) and can't find one anywhere.

Looking for large expansion plugs.

DFZ

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1948CaseVAI

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JK2

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bbrennan

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