5mm Thread Chaser or new Main Nozzles

[CUBuffs]

My '80 SG has a couple of main nozzles with damaged threads at the entrance so that my main jets can't grab onto them. I've been told that I need a thread chaser but I can't seem to find a 5mm size. Has anyone seen 5mm thread chasers, and if so where can I buy them?

The other option is to replace the nozzles but I'm having trouble finding replacements. Any ideas?

[BA80]

You'll need to know the thread pitch........

http://www.ebay.com/sch/i.html?_from...All-Categories

[CUBuffs]

That looks like a tap and I've been told that I need a thread chaser instead of a tap so I don't create new threads. It might be better to just buy the new main nozzles from Mikes XS. Has anyone used those?

[crazy steve]

...I've been told that I need a thread chaser instead of a tap so I don't create new threads...

Either will work as long as it's the right size and you're not ham-handed when using it...

[bikerphil]

It might be better to just buy the new main nozzles from Mikes XS. Has anyone used those?

They are not the same, you're just asking for difficult tuning issues. If possible, fix what you have, I don't see anything wrong with using a tap instead of a thread chaser, JMHO.

[CUBuffs]

Crazy Steve, you were right. I used a tap and it worked just fine. Thanks.

[clcorbin]

Just FYI, a tap and a thread chaser operate differently even if they do have some outward similarities. In short:

1) Tap - it CUTS new threads from a hole drilled to the minor thread diameter. Metal is removed.

2) Chaser - it "chases" the deformed threads back into their original position. No or very little metal is removed and you end up with (hopefully) clean and strong threads.

Obviously, you can't tap a hole with a chaser, but you CAN run a tap down a hole with deformed threads. The downside is you will be left with weaker threads because the tap came through and cut off most everything that was sticking out where it did not belong. The bolt/screw will also generally be looser after cleaning out a hole with a tap versus a chaser.

And yes, knowing this I have "cleaned up" any number of holes with a tap instead of getting the proper chaser... As my dad would say (and has on MANY number of occasions): "Do as I SAY and not as I DO!"