Patent ID: 6647608
Filing Date: 2003-11-18
Classification: B23P,F16B,Y10T

Abstract:
A method for installing a fastener including a shank portion in a host panel aperture wherein the fastener has an annular flange with anti-rotation tabs and further has a shoulder with a crown and a face with a back angled portion surrounding said shank portion, said method comprising the steps:supporting one end of said fastener and said flange with an installation fixture; receiving said shoulder of said fastener through an aperture in said panel; placing an installation punch over an opposite end of said fastener wherein the installation punch has a face portion bearing on said shoulder crown and an annular protrusion bearing on said panel area proximate to said panel aperture receiving said fastener shoulder; applying force to the punch in a direction toward the installation fixture; deforming the panel material around the anti-rotation tabs; flowing the panel material defining the panel aperture into said back angled portion; and deflecting said shoulder crown radially outward to engage said panel at the periphery of the panel aperture.