Which constraint would you use to position a pin inside a hole?

The Insert Constraint is specifically designed to control the relationship between cylindrical objects, such as a pin and a hole. It allows the pin to be positioned inside the hole while enabling the rotational motion around the axis of the pin. This means that when applying the Insert Constraint, the software ensures that the pin is correctly aligned within the hole, allowing for the required movement and fit that is necessary in many mechanical assemblies.

In contrast, the Flush Constraint is typically used when you want two surfaces to align without any gap, which is not suitable for positioning a pin in a hole. The Mate Constraint is useful for aligning parts face-to-face or edge-to-edge, while not providing the necessary functionality for cylindrical parts. The Tighten Constraint is generally used to apply tension, compression, or forces between parts rather than ensuring positional alignment within a hole. Each of these other constraints serves different assembly purposes, emphasizing that the Insert Constraint is the most appropriate choice for the task at hand.