The 1" Bore Aluminum Clamping Hub C is perfect for large applications that require 1" shafting or tubing and extreme holding power. This clamping hub has 4 equally spaced 1/4-20 tapped holes and 4 1/4" bore through holes for multiple mounting options. The side clamping machine screw is 1/4-20 and accepts a 3/16" hex key.
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