Fastener and method for fastening to associated structural assembly

A method for fastening a drill jig to said overlapping work pieces and clamping said overlapping work pieces together for facilitating accurate drilling of said overlapping work pieces comprising:

• positioning said drill jig onto said overlapping work pieces such that a drill bushing of said drill jig is aligned over a pilot hole in said overlapping work pieces;
• inserting a fastener through said drill bushing and said pilot hole, wherein said fastener comprises a fastener body and damper assembly, wherein said damper assembly is operatively connected to said fastener body;
• driving said fastener to a predetermined position such that a first load is applied via said damper assembly to said drill jig and a second load is applied via said fastener body to said overlapping work pieces, wherein said first load is less than said second load, wherein said first load is sufficient to hold the drill jig to the overlapping work pieces during drilling but without causing significant deformation of the drill jig, wherein said second load is sufficient to reduce burring during drilling of a hole through said overlapping working pieces.