DrmCa Report post Posted December 1, 2021 Needing to make custom screws for my Mitsubishi. My thread gauge shows that it is 1/8-40 thread. Does anybody know if it is US60 or Whitworth thread? Quote Share this post Link to post Share on other sites
nylonRigging Report post Posted December 2, 2021 You saying .."40 TPI " . . I just checked on a Mitzu. DB on the factory tapped holes on it's bed top . I threaded-in some ( 6-40 ) and they threaded in and bottomed out holding firm . But they did feel a little tiny sloppy when I was threading them in . Cast metal Heads are kind of soft easy to drill/tap . So I cant tell if it just a sloppy Tap work at factory ? . . Or it is some proprietary Thread size/pitch, that Mitsubishi used, that is real close to 6-40 ? . Quote Share this post Link to post Share on other sites
DrmCa Report post Posted December 2, 2021 Thanks! 6-40 and 1/8-40 screws are virtually indistinguishable. Could be either of them. I only need to chase the threads that have some spray paint in them and to make custom thumbscrews, so need to decide which tap and die to buy. Quote Share this post Link to post Share on other sites
