Black Oxide coated Steel spacers, 3/8" diameter, 3/16" length for a #10 screw (.195 center hole). These spacers can be used with any 10-32 or 10-24 threaded stud, knobs, levers or screws to offset or extend mounting positions.

This picture shows the spacer between two levers to illustrate the size. The lever on the left is a die-cast Metal with steel insert, on the right is the glass-filled Nylon with steel insert.