I have a bracket that currently fastens using a pair of 3/8-16 flat head socket cap screws with what is presumed to be the standard 82 degree taper, so the bolt holes on the bracket are countersunk. I need to mount a spacer to the face of the upper bolt hole, and need a flush/flat surface to do so. Is there a name or standard for a conical washer that is used to fill a countersink (green portion of very rough attached sketch)? I would prefer to find an off the shelf solution before having to machine one, and have only been able to locate finishing washers, spherical washers (such as those for rod end misalignment), or washers that are countersunk on top rather than flush. Any help would be much appreciated!
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