Mesh > Mesh Stitch
 
 
 

Seals gaps between the boundaries of components in a mesh.

Stitch seams between mesh components

This tool works best to eliminate narrow gaps between boundaries. To fill larger openings, use Mesh > Mesh Cleanup > Mesh Hole Fill.

Tolerance

This tolerance is used to determine which boundaries should be stitched together. If two boundaries are further apart than this value at some point, they will not get stitched together at that point.