Oil drain plug info

[irish.david]

I've managed to rip the threads out in the hole for the engine sump drain plug so it's heli-coil time. I've got a new sump plug already so i know it's an M14. Problem is that i can't find my thread pitch gauge so i can only guess at the pitch. The ETKA says it's 1.5 but before i drop £40 on a Heli-coil kit i want to confirm it's 1.5. Anyone know this or am i going into town tomorrow for a new thread pitch gauge.

Cheers

Dave