[TR] bottom trunnion grease fitting size?

[Randall]

> There's a good chance that if this is an original trunnion, 
> the fitting is a BSP (British Straight Pipe) thread. 

Nope, the TR3 fittings are definitely tapered threads.  1/8 BSPT (British
Standard Pipe Tapered) is close enough that they might interchange to some
extent (.021" smaller and 28 tpi instead of 27); but the one I checked was
definitely NPT.

Randall