In "Plans & Specifications of the L.C. Smith Shotgun", (pages 87-88) the bushings had a thread of 5/16-32.
There was someone that found some allen head cap screws in this size and had some made, but from the factory they were made from soft steel. On ebay a while back someone was selling them in pairs.

Last edited by JDW; 08/18/09 02:06 PM.

David