The 647 is an M47 x 1.0 threaded tap designed for use with the BTS-1 Bottom Bracket Tapping Set to tap T47 bottom bracket shells.
CHOOSE WHICH SIDE YOU NEED:
- The 647R is Right hand threaded used on the non-drive side (left side) of the bike
- The 647L is Left hand threaded used on the drive side (right side) of the bike
- Call us for special discount if you purchase both sides
NOTE: Always use cutting fluid such as Park Tool CF-2 when machining.