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The hole spacing on these leadscrews is not compatible with the hole spacing on our older Precision Leadscrews. The optional Leadnut Adapters allow you to use these leadscrews with the old style printed X ends. They include the two required printed parts, plus all necessary hardware. If you are designing your own X ends, the hole pattern on these leadnuts is 3-5mm holes in a .5625" pattern radius. You can download the STL for the Leadnut adapter here. Note the adapters for the PBC and Thomson Leadnuts are not compatible.
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