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Wendall, I think the pennie thing was a figure of speech. At first, the super thick stuff sounds good in copper , bronze or whatever, but in looking at the whole thing, you find the thicker the shim/disk the less actual thread contact between the plug bolt and valve. So, if only a few threads are holding a huge disk, the plug is now comprimised in a way that is just as bad or worse than the original flimsy disk as the whole plug can blow out under pressure or even mild impact. The next step is finding something with superior strength without the required thickness. The stainless disks accomplish this. Higher strength than the thicker copper, bronze, or whatever without the required thickness plus a higher degree of corrosion resistance. you can get them from some of the guys in Fl Wendell Grogan wrote: > > Quick question, can you really use US pennies? The reason I ask is that > it occurs to me that pennies are no longer made of copper, but rather > some base metal with a thin copper coating. Given the relatively low > cost of copper sheeting, it might be safer to use that instead of > pennies. > Wendell -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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