…. yet quite unnecessary. It might go some way towards explaining Sherline's prices though And it certainly won't be a Class-3 on the original hardware after running an M5 tap through. If it were me, that would be the last resort. Before that, I'd run a regular #10-32 tap through and try the fit again.

> P.S. — Although the choice of 10-32 into Aluminiun Alloy may raise the odd eyebrow ….

Not by me …. do it all the time.

.

Well, of course not … I only ever suggested running an M5 tap through because Anthony was unable to find 10-32 studding at a reasonable price.

My first suggestion [and my prefrerred solution] was to use a decent 10-32 die to re-size some readily available M5 studding.

It is not really worth pursuing this discussion any further.

MichaelG.

Edited By Michael Gilligan on 09/07/2015 06:51:02

Hi Ian, I think 3/16 UNF is 10-32. 10-32UNF was common on Austin Morris cars when they went unified before they were metricated in the 70s. I think it was used to replace 2BA

Mike