Posted by Dave Springate on 22/02/2019 08:32:08:
… but the BSF stuff seems expensive or is it just me being a cheapskate ?
Keep an eye on the cost of metric vs imperial alternatives, generally metric is more likely to be readily available and off-the-shelf cheap. Unless you're in the USA, and they don't do BSF!
These days BSF threads are almost totally used to maintain old machines. When you buy BSF, you're either getting 'New Old Stock', or low quantity production made for a small specialist market. Prices are somewhat higher, and uncommon sizes gradually become unobtainium.
The more out-of-date a thread is, the more expensive and difficult they are to buy. Only a barbarian would allow metric fasteners on a classic British machine. One of the many advantages of owning a lathe is being able to make them yourself!
Dave