Seat Spring Mounting Bungs
These seat spring bungs are fishmouthed to fit on standard 1" diameter tubing frames. They can EASILY be filed to fit up to 1 1/4" tube frames too. The center shaft is 3/8" in diameter, and they are supplied with leather washers to keep the springs from squeaking and eating up the paint. Shafts can be drilled to accept pins to hold the springs if you desire.