A blind hole refers to a hole that does not pass completely through a part, i.e., it is only drilled, reamed, or milled to a depth that is a fraction of the total part thickness. The depth of a blind hole is usually determined by the threading requirements of the fastener to be used for the specific application. For more details, please visit :- https://mim-supplier.com/blogs/knowledge/what-are-blind-holes-in-engineering-and-machining