I've noticed the stock skid plate bolts and RCI skid plates appear to have exposed bolt heads rather than being recessed to provide some protection. If going with skid plates that have exposed bolt heads, these look like they'll provide some protection:

agm-products.com


AGM Skid Pan Washers | AGM-Products.com
This specially designed washer was made to protect the bolt's head from all sides, as it sits flush with the washers top edge. Constructed out of staninless steel, so they are strong, yet surprisingly lightweight and accepts 1/4" and 5/16" bolt sizes.
