AlistairHowie Posted April 16, 2012 Share Posted April 16, 2012 Can someone please explain the most common thread types, sizes, names used in astronomy kit e.g. t-threads, m-threads, etc? I'm VERY confused!Many thanks. Link to comment Share on other sites More sharing options...
Tinker1947 Posted April 16, 2012 Share Posted April 16, 2012 I think it depends what part of the world the parts come from, Metric, Whitworth, UNC there are many different threads used... Link to comment Share on other sites More sharing options...
AlistairHowie Posted April 16, 2012 Author Share Posted April 16, 2012 OK, well that's a start! Didn't know about Whitworth or UNC, I presumed everything was just metric. Are there a few key thread sizes that keep cropping up? Link to comment Share on other sites More sharing options...
Psychobilly Posted April 16, 2012 Share Posted April 16, 2012 1/4"-20 UNC approx 1/4" Whitworth - common on cameras and smaller tripods3/8"-16 UNC approx 3/8" Whitworth larger tripod headsM3 through M6Sent from my GT-I9100 using Tapatalk 2 Link to comment Share on other sites More sharing options...
steelfixer Posted April 16, 2012 Share Posted April 16, 2012 larger threads used for t rings ect are 42mm or 48mm either 0.75 or 0.1 pitch Link to comment Share on other sites More sharing options...
AlistairHowie Posted April 17, 2012 Author Share Posted April 17, 2012 Many thanks Link to comment Share on other sites More sharing options...
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