nigel bessant wrote:Might I suggest that you get hold of a "Zeus" book. It's a small booklet that gives loads of information on, apart from other things, thread information, ie pitch, depth, form, as well as tapping drill sizes and reccommended clearance hole sizes. It covers all thread forms and you never know when you might need it for other threads, like Big F*ck Off V8 Yanks! The other thing that is useful is a good quality thread pitch guage. not the cheap ones as these are usually a fettled stamping. I bought my Zeus book at the young age of 17 as a silly little apprentice. It's lasted 33 years and smells of cutting oil!!
Ah, it was too lateral

ok just re read is this "Zeus" book real? or called by something else?