The Park Tool 691 Right Hand Threaded English Tap, click to enlarge

Item # 691

/ Tools / Frame & Fork

Right Hand Threaded English Tap

The 691 is a 1.370" x 24 TPI right-hand threaded tap designed for use with the BTS-1 Bottom Bracket Tapping Set to tap English threaded bottom bracket shells. This tap is used on the non-drive side (left side) of the bike.

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691 Features

  • 1.370" x 24 TPI right-hand threading
  • Sized for English bottom bracket shells

NOTE: Always use cutting fluid such as Park Tool CF-2 when machining.

Repair & Service

Compatible Products


Bottom Bracket Tapping & Facing Set



Stay on the Cutting Edge

Use Park Tool Sharpening Services