Nail-shaped fastening element

Abstract

A nail-shaped fastening element having a shank, at whose one end a tip is configured and at whose opposite other end a head is configured, and having a sleeve-shaped washer is disclosed. At a first end facing the tip, the sleeve-shaped washer has a first collar that narrows the opening cross section of the sleeve-shaped washer and, at a second end facing opposite the first end, it has a second circumferentially outwardly disposed collar.

1 - 5 . (canceled) 
   
   
       6 . A nail-shaped fastening element comprising:
 a shank having a tip formed at a first end and a head formed at second end opposite the first shank end; and   a sleeve-shaped washer coupled to the head of the shank that includes a first washer end facing the tip of the shank, a second washer end opposite the first washer end, a first collar at the first washer end that narrows an opening cross-section of the washer and a circumferentially outwardly disposed second collar at the second washer end.   
   
   
       7 . The fastening element as recited in  claim 6  wherein the first collar is designed as a continuously circumferentially extending projection. 
   
   
       8 . The fastening element as recited in  claim 6  wherein the second collar is designed as a continuously circumferentially and radially outwardly extending projection. 
   
   
       9 . The fastening element as recited in  claim 6 .wherein a height of the sleeve-shaped washer corresponds approximately to 0.1 to 0.3 times a first height of the shank from the tip to the head. 
   
   
       10 . The fastening element as recited in  claim 6  wherein the shank has at least one first portion of a larger diameter and at least one second portion of a smaller diameter, the height of the sleeve-shaped washer corresponding to approximately 0.4 to 0.6 times a second height of the second portion.