Acoustic isolation fastener and method for attachment

A fastener for attaching first and second members by means of substantially aligned first and second openings in the respective members to provide acoustic isolation between the members, each opening having a predefined depth and peripheral shape, said fastener comprising:

• a longitudinal shaft portion having first and second segments, said first and second segments having a cross-sectional shape substantially conforming to the a predefined peripheral shape of the first and second openings, respectively, said first and second segments having a longitudinal length substantially conforming to the depth of the first and second openings, respectively;
• a cap member integrally disposed longitudinally at a first end of said shaft portion adjacent and outside of said first segment, said cap member having an outer periphery larger than the first opening to inhibit passage of said cap member therethrough;
• a spacer member positioned longitudinally on said shaft portion between said first and second segments thereof having an outer periphery larger than the first and second openings to inhibit passage therethrough so as to secure the first member on said first segment of said shaft portion between said cap member and said spacer member and to space the first and second members a predetermined distance from each other corresponding to the longitudinal dimension of said spacer member;
• and
• an abutment member positioned longitudinally on a second end of said shaft portion adjacent and outside of said second segment having an outer periphery larger than the second opening to inhibit passage of said abutment member therethrough so as to secure the second member on said second segment of said shaft portion between said spacer member and said abutment member, said spacer member and said abutment member each having at least one slot therein to permit circumferential compression thereof so as to allow passage of said spacer member and said abutment member through the first and second openings, respectively.