In almost all design assemblies the use of subjection parts is imperative, the correct selection of this elements highly affect the process of manufacture and real world assembly. Thinking in a low costs, highly maintainable, standard desing could be the diference between a failure and a succes project.
This is a little Free Library of common subjection parts that can be used in any project.
This parts are already standardized and can be used with the certainty that can be acquired on the construccion of the real model.
Download: Common subjection parts.zip