TR3A oil galley lug question

["Ken Gano" <triumphs@mcleodusa.net>]

Could someone confirm the thread standard on the oil galley plugs on a 4
cylinder wet liner engine?  I was told that it was BSP (British Standard
Pipe), but my measurements do not confirm this.  (According to the Pegasus
catalog, 1/8" BSP should be .38" x 28 TPI.  The one that came out measures
.366" and looks like 18 TPI).

Thanks.

Ken Gano