| 摘要 |
A blind rivet includes a body having a shank, a head and a bore therethrough and includes a drawing mandrel having a shank receivable in the bore in the body and having a head at one end of the shank, the maximum diameter of the head being substantially equal to the outside diameter of the body shank. The body shank has, at a location spaced from the free end of the shank, a section of reduced wall thickness defined by a step increase in the diameter of the bore. A plurality of spaced planar bevel surfaces are preferably provided on the head of the drawing mandrel and are inclined inwardly toward the top thereof. In one embodiment, the portion of the bore on the side of the step remote from the free end of the body shank preferably widens conically toward the head of the body.
|
