Registered Forum User
Big Twin
Posts: 1,291
Join Date: Feb 2005
Location: Cleethorpes
Mood: Hmmm Conference season
A Dowty seal, is a washer with a rubber lip/seal type affair in the center hole, as you tighten the bolt onto it the rubber forms a seal, As Skids said tho a copper washer is more than enough, Afterall they are good enough for brakes under pressure.
glyn