10pcs ISO 15978 M4.0 Countersunk Open Head Break Mandrel Blind Rivets

Size:M4 6/ M4 7/ M4 8/ M4 9/ M4 10/ M4 11/ M4 12/ M4 13/ M4 14/ M4 15/ M4 16/ M4 18. Head Type: Countersunk Head. Material: Aluminum(Body), Steel(Mandrel);. The rivet assembly is inserted into a hole drilled through the parts to be joined and a specially designed tool is used to draw the mandrel into the rivet.