Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

zoran

macrumors 601
Original poster
Jun 30, 2005
4,809
134
I dont understand whats the size of the screw im attaching. The guy holding it says its "metric eight" size... what does that mean?
 

Attachments

  • Screen Shot 2020-03-02 at 23.43.33.png
    Screen Shot 2020-03-02 at 23.43.33.png
    378.3 KB · Views: 194

D.T.

macrumors G4
Sep 15, 2011
11,050
12,467
Vilano Beach, FL
I dont understand whats the size of the screw im attaching. The guy holding it says its "metric eight" size... what does that mean?


It's just metric, M8 = 8mm diameter (though there's potentially some variant in the thread, fine vs. course, but assuming something standard, like an M8 x 1.25), that's vs. an imperial spec that uses inches, ex: 5/16" (~7.9mm)
 

zoran

macrumors 601
Original poster
Jun 30, 2005
4,809
134
Thanks but i dont understand what you say... "variant in the thread" and "fine vs. course"... what are you trying to say? :oops:
 

D.T.

macrumors G4
Sep 15, 2011
11,050
12,467
Vilano Beach, FL
Thanks but i dont understand what you say... "variant in the thread" and "fine vs. course"... what are you trying to say? :oops:

If you look at a screw/bolt, it has threads, right? There's a specification as to how many threads per X are on the fastener, more = fine, less = course (more or less), i.e., just because you match the diameter spec (M8 or 5/16") doesn't necessarily mean it will work.

My recommendation: take the part you're trying to match to a hardware store where they sell fasteners, and test for proper fitment.
 
Last edited:
  • Like
Reactions: zoran

jeyf

macrumors 68020
Jan 20, 2009
2,173
1,044
most cities have several industrial supply houses that specialize in fasteners. Pick one with good with counter service.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.