i used a blind nut (actually four) to replace my sheet metal screws that were in my bolt that heald a gun rack.
them holes were all tore up anyway. this is much cleaner.
this is what they look like and a hardware (true value) store should have them.
http://images.google.com/imgres?imgurl=http://www.allproducts.com/manufacture98/ihancom/product1.jpg&imgrefurl=http://www.allproducts.com/manufacture98/ihancom/product1.html&usg=__vfU7L9_yEfRiyF6zUHibvUskM2Y=&h=200&w=200&sz=62&hl=en&start=1&um=1&tbnid=8hCfKI63hlNk3M:&tbnh=104&tbnw=104&prev=/images%3Fq%3Dblind%2Bnut%26um%3D1%26hl%3Den%26sa%3DG
another type of
http://www.emhart.com/products/pop/popnut.asphttp://www.threadrite.com/pop_nuts/Ps, here is my new rear window rack
http://s67.photobucket.com/albums/h298/1951otter/?action=view¤t=4495365-R1-044-20A_1.jpg