NOTE: For sharpening services of cutting tools see Park Tool Sharpening Services. Always use cutting fluid such as Park Tool CF-2 when machining.
Right Hand Threaded Italian Bushing
The 688 is a threaded insert for the BFS-1 Bottom Bracket Facing Set in the 36mm x 24 TPI Italian threading standard. The 688 is sold individually, but two inserts are required for use.