Don't know whether that's by design but it would make sense since you don't want the pin loose at the top and tight at the bottom. Also, since the top of the hole gets the most abuse during installation, such a design might tend to create more uniformity in block contact along the length of the pin once the pin is driven in. David Love davidlovepianos at comcast.net www.davidlovepianos.com Denro 2/0 x 2 3/8" blued: Tapers from .281 - .282" at the bottom of the thread to .283 - .284" at the top of thread. Denro 3/0 x 2 3/8" blued: Tapers from .284 - .285" at the bottom of the thread to .287 - .288" at the top of thread. ~Kendall Ross Bean
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