Threads cut incorrectly on new radiator?

[Come on Dave]

Nice one, thanks Jeff. It's coming from China so it should fit the rad OK!

 

[Come on Dave]

This one seems to be in UK so would come quicker, however it is described as carbon rather than HSS so may not be as good? I've asked the seller which would be best.

1/2 X 14 BSP CARBON TAPER TAP-THREADING TOOL FROM CHRONOS ENGINEERING SUPPLIES | eBay

 

[jeff the gasman]

This one seems to be in UK so would come quicker, however it is described as carbon rather than HSS so may not be as good? I've asked the seller which would be best.

1/2 X 14 BSP CARBON TAPER TAP-THREADING TOOL FROM CHRONOS ENGINEERING SUPPLIES | eBay

That will be fine for what you need. Just blunts quicker than hss.

 

[Come on Dave]

Cheers Jeff

 

[BoilerBob]

I wouldn’t use a carbon tap too brittle always use high speed steel the plug tap is the one to use as it’s straight through and will do a decent job I carry several sets of taps and have found I use them more and more as standards of production have unfortunately fallen in the last few years. Bob

 

[Come on Dave]

Many thanks for your advice Bob, much appreciated

 

[BoilerBob]

You’re very welcome. Bob