691 - Tap, 1.370"x 24 tpi British right Hand thread for BTS-1

This Park Tool tap is engineered for the BTS-1 Bottom Bracket Tapping Set, delivering precision thread generation in English-threaded bottom bracket shells at 1.370" diameter and 24 threads per inch. The right-hand geometry is specifically configured for non-drive side (left) applications, ensuring proper thread orientation and bearing surface preparation. An essential component for technicians performing bottom bracket shell restoration, repair, or threading operations on vintage and contemporary frames requiring English standard specifications.

• 1.370" x 24 TPI right-hand threading
• Sized for the English bottom bracket shell standard (also referred to as BSA, BSC, BC, ISO, British, or Euro)