B s p

[Richard Farrant]

Originally Posted by Stew Robertson

here is a quote from the machinist handbook
My question is why would you a loose fitting thread or a free fitting thread to fasten an axle in . yes you guys are talking the same threads but not machine cut threads where they are designed to hold a load for a to attach a wheel where they can be torqued to the right spec.

PS I think you owe me lunch again

Your book is referring to American National Pipe threads, we are talking British Standard. Proof is shown in the original parts book that it is BSP. If a male and female thread are cut to the correct tolerances, there is no reason for them to be "loose fitting", that was referring to pipe nuts, this is a pipe thread form used elsewhere. In my work experience I have also come across BSP used in other roles, not pipe.

You might have to go hungry, no lunch yet