Can your machinist explain in layman's terms how you work out the thread of a given bolt, etc, in order to tell unhelpful people behind the counter (or on the I'net) precisely what you want? Something I NEED to understand, but I am woefully ignorant (my wife made me say that).
The shame... a man who love the Smiths but doesn't know Whitworth from metric.......
The shame... a man who love the Smiths but doesn't know Whitworth from metric.......
