SME V - VTA screw replacement

Totem395

Thank you for that info, never have heard of the BSW thread pattern.  Seems like the SME VTA Screw is 1/8" BSW, looked for Screws which seem very hard to find especially in the length required, However a Die can be bought for GBP 5 http://www.tapdie.com/html/bsw-_dies.html
so one could easily make one from a piece of Stainless Rod or similar.

http://www.motalia.com/Html/Charts/bsw_chart.html

Good Listening


Peter

I do not think it is a 1/8BSW, because the original VTA Screw has 2,7mm diameter.

It is maybe an #4 - 48UNF
https://www.dropbox.com/s/si6nzcawue457vd/vta%20screw.jpg?dl=0

The Witworth does seem to be a very odd choice although it does have that empire esk heritage.

Done a little more research the thread size is 6BA 

https://en.wikipedia.org/wiki/British_Association_screw_threads

Correlates with the apx 2.7mm thickness and the 48 threads per inch

Found some all thread on eBay but the seller in England will not ship to the US

https://www.ekpsupplies.com/6-ba-stainless-threaded-rod-12-length.html

Don't know if above will ship to the US but it might be worth a try

Best of Luck

Peter