Park Tool 684S – Threaded Guide Set for English Bottom Bracket Shells

The Park Tool 684S is a precision-engineered set of 1.370" x 24 TPI threaded guides designed for use with the BTS-1 Bottom Bracket Tapping and Facing Set and BFS-1 Bottom Bracket Facing Set. These guides ensure perfect alignment and stability when facing English-threaded (BSA) bottom bracket shells, helping mechanics achieve clean, accurate, and professional results every time.

The set includes both right-hand and left-hand threaded guides, enabling proper use on each side of the bike during facing operations.

Features

• Dual-Side Set – Includes one right-hand threaded (part #681) and one left-hand threaded (part #682) guide.

• Standard English Threading – 1.370" x 24 TPI, compatible with BSA/BSC/BC/ISO/British/Euro bottom bracket shell standards.

• Professional Compatibility – Designed for use with Park Tool BTS-1 and BFS-1 Bottom Bracket Sets.

• Precision Machined – Ensures smooth threading and accurate facing alignment for consistent results.

• Durable Construction – Made from high-quality steel for long-term shop use and reliability.

Additional Information:

• Model: 684S

• Thread Type: 1.370" x 24 TPI (Right & Left Hand)

• Standard: English / BSA / British

• Compatible Tools: BTS-1, BFS-1

• Country of Origin: USA / Taiwan (varies by batch)

• Commodity: Bicycle Frame Preparation Tool Accessory