Controlled preload, self-retracting captive fastener assembly

A self-retracting, controlled preload, captive fastener assembly adapted for installation in a first structure and securement in a second structure, said fastener assembly comprising:

• a fastener having a predetermined length, an uppermost end, a lowermost end, a head at said uppermost end, and a shank portion having an outer wall proximate said uppermost end and a threaded portion proximate said lowermost end;
• means, intermediate said fastener ends and captivated along said shank portion outer wall, for applying a predetermined preload when a first structure is secured to a second structure by said fastener assembly, said means including a plurality of disc-shaped springs stacked upon each other about said shank portion outer wall;
• and
• stop means on said fastener for positioning said fastener and said means for applying a predetermined preload in an arrangement with respect to the secured first and second structures in a manner permitting achievement of the desired controlled preload, said stop means being a removable stop-nut constructed and arranged to abut said shank portion intermediate said outer wall and said threaded portion, and to abut the second structure whereby further application of the preload is prevented,
• said fastener including a plurality of protrusions formed integral with said shank portion outer wall,
• said springs and said means for biasing said fastener being captivated on said shank portion between said protrusions and said fastener head.