Pigtail fastener

1. A fastener for releasably securing a line having a cross sectional thickness and at least one free end, the fastener comprising:

a shaft dimensioned for wrapping the line around the shaft, the shaft having a pair of ends at least one of which includes:

an insertion structure extending from the end that defines an insertion opening; and

a retaining structure extending from the end a distance greater than the cross sectional thickness of the line that defines a retention aperture operably dimensioned smaller than the cross sectional thickness of the line,such that when the free end of the line is inserted through the opening, positioned adjacent the shaft, and then wrapped around the shaft and positioned in the retention aperture the line is releasably secured.

2. The fastener of claim 1 wherein the retaining structure is selected from the set of structures comprising: a coil, an arc, two prongs, a flattened portion, a notched portion, a bowed portion, offset loops of a coil, or any combination thereof.

3. The fastener of claim 1 wherein the retaining structure is constructed and arranged to provide a biasing force against the shaft.

4. The fastener of claim 1 wherein the retaining structure has a line receiving lip portion that protrudes away from the shaft, the lip portion constructed and arranged to receive a portion of line therein.

5. The fastener of claim 1 further comprising a line that is inserted through the line insertion opening and wrapped around the shaft and then held between the shaft and the retaining structure.

6. The fastener of claim 1 wherein the shaft has a predetermined diameter, a region of the retaining structure having a diameter less than the predetermined diameter of the shaft.

7. The fastener of claim 1 wherein the retaining structure is characterized as having an initial diameter region and a reduced diameter region.

8. The fastener of claim 1 wherein the fastener is constructed from a continuous piece of material.

9. A fastener for releasably securing a line having a cross sectional thickness and at least one free end, the fastener comprising:

a shaft having at least one end shaped into an insertion structure, the shaft dimensioned for wrapping the line around the shaft;

the insertion structure having a retaining structure;

the shaft and the insertion structure configured such that when the line is directed through a fastened path, the fastener facilitates securing the line proximate the retaining structure such that frictional force prevents the unsecuring of the line along the fastened path;

the shaft and insertion structure further configured to facilitate an unfastened line path corresponding to the fastened line path for releasably securing the line.

10. The fastener of claim 9 wherein the retaining structure and the shaft are separated by a gap, the line being biasedly trapped in the gap.