02-11-2017, 11:18 PM
(02-11-2017, 11:13 PM)Ruairidh Dunford Wrote: Good to see my memory is not all gone to pot David - can you answer the question about Whitworth form for me please?
Stuart has given a very comprehensive & erudite answer! I always understood that the 'admiralty' threads had a Whitworth tooth form, but I am willing to be corrected.