Method of connecting two members using a pin

A method of connecting a floating type brake disc assembly by pins, comprising the steps of:

• disposing a hub and an annular disc in a concentric relationship with each other with a clearance therebetween, each of said hub and said annular disc having plural sets of semicircular connecting dents opening toward said clearance to thereby form inserting holes;
• inserting a hollow pin into each of said inserting holes;
• fitting a washer onto one end portion of each of said hollow pins;
• and
• caulking said one end portion of each of said hollow pins radially outward to thereby fix said washer in position,
• wherein each of said hollow pins is made of a metal having a surface-treated layer and is formed into a convex shape in at least part of said end portion, and
• wherein said caulking is made by rolling a roller over said one end portion of each of said hollow pins so that rolling pressure applied during said caulking step is dispersed or distributed so that any damage to the surface-treated layer is prevented,
• wherein a parabolic shape is formed in both in an inner periphery and in an outer periphery of said end portion of said hollow pin.