On 07/01/2021 16:48, John Rumm wrote:
On 07/01/2021 13:22, misterroy wrote:


Can plug tap sometimes mean second and sometimes bottoming?

Yup... a plug tap is the same as bottoming one - no taper at the end, so
needs a mostly already threaded hole to be able to carry on and do the
last bit in a blind hole.

Here is RS's plug taps selection, some of them look like they get
close to the bottom, others less so.
https://uk.rs-online.com/web/c/hand-...ons=4294885797


The names seem to vary from website to website.

Not sure those pictures actually match the descriptions in many cases.


This is a proper plug tap:
https://uk.rs-online.com/web/p/threading-taps/0152249/