Patent ID: 7290971

Claim:
An in-assembly fastener for insertion into a clearance hole in a part with which said fastener is to be shipped, said fastener comprising: a head section located at a first end of said fastener; a first threaded section of preselected diameter formed on said first end of said fastener; a second threaded section of preselected diameter formed on a second end of said fastener; a gripper section, located between first and second threaded sections, said gripper section having a preselected outer diameter less than the diameter of said threaded sections and having a preselected axial length; wherein said gripper section further comprises an irregular surface, said irregular surface structure having a helical groove structure that contains crest portions that are shallower than crest portions of said threaded sections; and an o-ring frictionally mounted on said gripper section, said o-ring having an outer diameter sized for insertion into a clearance hole with a diameter smaller than the outer diameter, wherein said o-ring outer diameter of said o-ring is selected to cause physical distortion of said o-ring in an axial direction along the length of said gripper section when said fastener is moved axially with respect to the clearance hole.