Applying Multiple Constraints to Features
You can define multiple constraints as primary, secondary, or tertiary. For example, an assembly could require you to mate a feature with more than one feature, such as a shaft constrained at both ends by a set of bores.
Examples
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Secondary shaft
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In this example, the main shaft, which is mated to the housing, must align with the housing's left and right-side holes. The secondary shaft must align to the center bores of the two cover plates.
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Main shaft
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When constraining the main shaft to the housing, select the concentric  options for the both the left and right-hand hole as primary constraints.
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When constraining the secondary shaft, select the concentric options for each cover plate as primary constraints.
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Other examples of applying multiple constraints:
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You can mate the cover to the two planes on the base using two coincident constraints.
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You can mate the four holes on the cover with four holes on the housing as the secondary constraint.
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