Irontite Brand Automotive Ductile Iron Taper Plugs
Model: TYPE C
Size: .420 x 5/16″
Drill Size: 25/64″
Irontite Plugs are made from American Ductile Cast Iron that is stress relieved and machined to size at the Irontite Factory in Cedar Rapids, Iowa – USA.
Stress relieved ductile cast iron expands and contracts at the same coefficient when heated and cooled as the material found in cast iron diesel and gas engines.
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