What size are my nipples

[Dell]

Hi all
nothing to do with welding but,

i am trying to find replacement oil nipples ( they look like grease nipples) for my 1940’s Pultra 17/70 I think the thread is 0 BA because a tap seems to thread in but is there anything else that is that close that they could be , they wouldn’t be metric at that age, also I am having trouble locating 0BA nipples if anyone knows where I might get some, most seem to be 2BA .
thanks Dell

 

[Hood]

Have you tried an M6 in it, pretty close to 0BA I think

 

[Anguz]

its only the angle that differs i believe 55 opposed to 60 degree

 

[Hood]

47degrees or thereabouts I think.

Edit
Just looked 47.5 degree for BA

 

[Seadog]

0 B.A is M6x1

As Hood says, the thread angle is different. However, you could easily run an M6 tap to clean out the thread.