itÂ´s not so easy to handle the different "inch based threads".
Actually, BA is
a "metric-based" thread based on a 6 mm fastener with 1 mm pitch. However, it is implemented in a seemingly-odd way with the pitch of the BA series 1 mm Ã— (0.9)BA no.
. This makes for a smooth progression with smaller diameters and each successive pitch 10% finer than the one before. Although the 47Â½Â° thread form is different than the 60Â° metric, this means the dimensions of a 0 BA fastener are a very-metric 6 mm with 1 mm pitch. After that, though, they go off the rails.
This means that, despite the difference in thread form, you would have been in luck if the nuts were 0 BA Unfortunately, they're 2 BA, which means the pitch is 1 mm Ã— (0.9)2
= 0.81 mm. The diameter is ~4.6 mm.