On Tue, 27 May 2008 08:32:09 -0700 (PDT), RobertL
wrote:

On May 27, 4:19*pm, Martin Bonner wrote:
On May 27, 4:06 pm, bof wrote:





In message , Kevin Poole
writes

bof wrote:
*Anyone tell me the correct definition for the length of a
countersunk *screw that's 5mm long overall, comprising a 3mm threaded
section plus a *2mm deep countersunk head? Is it a 5mm or a 3mm screw,
or even something *else?



... and the follow up trivia question: In a 1/2" BSP pipe. What
measurement of the pipe is actually 1/2"?

The diameter of the 'hole down the middle', which is really the
important parameter rather than the outside diameter :-)

--
Frank Erskine