metric eight size?

D.T.

macrumors G4
Sep 15, 2011
10,557
10,266
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 68040
Original poster
Jun 30, 2005
3,328
48
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
10,557
10,266
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.
 
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jeyf

macrumors 68000
Jan 20, 2009
1,699
761
most cities have several industrial supply houses that specialize in fasteners. Pick one with good with counter service.
 
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