Hope u guys can explain this to me. I dont come across these BSPT threads much, once in a bluemoon.The other day I had to m/c 10 off tubes that called for a 2.5"BSPTx25mm long thread on 1 end, and for the life of me (and my boss by the way)couldn't figure out how u work out what taper to machine on the od, as after looking up in the machinerys handbook it states "thread od 2.960 depth 0.058 taper is one in 16". ????????? how do i work out what my od would be at small end of thread? What am i missing