23 May
2011
23 May
'11
6:30 a.m.
As for the pitch, I used those pitch guages which
conssit of little
strips of metal with accurately cut teeth in one edge. Alas my metric set
doesn't include 0.6mm ( which is odd, since it's common for M3.5 screws),
hut the imperial one that fits is 42tpi. 42tpi is about 0.605mm pitch. I
could beleive 0.6mm (it's not that accurate after all). The 40tpi
imperial gauge doesn't fit at all.
I'd still bet a donut, that a 5-40 would fit just fine for anything without a long
engagement.
Tim.