On 08/06/2014 12:10, Peter Taylor wrote:
"Dave Plowman (News)" wrote in message
...
In article ,
Peter Taylor wrote:
Can I use a 3/8"-20 BSW bolt in 3/8"-20 UNC thread? I'm making an
adapter plate for my theodolite tripod so I can mount a camera or
spotting scope. The tripod screw is 5/8" UNC and I've managed to source
the drill and taps for this end of the plate. But at the other end,
the tripod head has a 3/8" UNC socket and I need a bolt to screw into
it. Just one. There are only about 5 turns in the socket.

The only UNC bolts I can find on Ebay are from USA and the postage is
£27! So can I cheat and use a BSW bolt?

http://www.namrick.co.uk/acatalog/Ho..._Screw_10.html

Thanks Dave, I forgot to mention it needs to be brass.

You might find them in various local metalwork dealers that cater for
imported US cars.

Although brass might not be an option. If you say where you are then
someone might be able to point to a helpful shack or Alladin's cave.

--
Regards,
Martin Brown