D-1 Automotive Ductile Iron Plugs, Box of 25

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. ** For the seal that is Irontite! **

Thread Length = 1 7/16”

Small end Diameter = 0.490”

Use Drill size = 15/32”