The Cape Dory Board

One simply overtightens the tightening nut until it shears the nice soft brass threaded bolt end of the tapered plug right off. Quite simple and effortless and expensive.

They are made by Spartan. Don't have catalogue any more, but they're still in business. Good company. Try "Spartan Marine Hardware" on Google. They're now part of Robinhood Marine in Maine. , Bill, thanks for the tip, can't tell you how many parts places told me that they weren't being ma...

i broke off the threaded end of the tapered plug in the engine coolant supply seacock, anybody have any part number or manufacturer information about that seacock and how available a replacement part is?