> But it seems quite conceivable to me that if you had a major change in > humidity from the installation level then the flange is going to swell > and be crushed. If this is in fact going to damage the flange then > perhaps the screw shouldn't have been put in that tight to begin with. > >Regards, > >Phil Ford That's the reasoning behind the spring washers recently discussed here. Once installed, they would keep the flange tight enough for a long time if left alone. But then annual tightening of screws in dry seasons will make spring washers superfluous too. Ron N
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