Gas Tank Petcock Bung Hole Taps (1) - Choose Tap Type / Size Type - Specs:1/4" BSP (Thread O.D. .518" x 19 TPI - USE 26/64" Drill Bit) Measures 25MM X 52MM X

Measures 25MM X 52MM X 15MM with an Internal "C3" Clearance

May also fit other makes and models

Star Twin & Thunderbolt) from 1962-1972

"Use Lightoil" & "SAE

We have many Wassell Evolution bore sizes to choose from

Gas Tank Petcock Bung Hole Taps (1) - Choose Tap Type / Size Type - Specs:1/4" BSP (Thread O.D. .518" x 19 TPI - USE 26/64" Drill Bit) Measures 25MM X 52MM XBefore you prep and begin painting your gas tank, make sure your petcock bung holes are clean with sharp threads. It is not uncommon to find gas tanks with damaged or crossed threads from "hacks" over the years We stock a few types of bung hole taps BSPP (British Straight Parallel Pipe & British Standard Pipe Tapered) all suited for various applications on Triumph, BSA, Norton and other makes and models Our petcock bung hole taps can also be used for