Concave Cup Special Ground Expansion (Freeze) Plugs
QualCast Expansion Plugs are produced from the highest quality steel in a wide variety of cup designs. For marine, performance, or heavy duty applications we recommend brass or stainless steel materials. We carry standard cup, shallow cup, and concave cup in all three materials, as well as in metric sizes.
1.500" Hole Dia. | 1.500" OD | .430"H