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zoran

macrumors 601
Original poster
Jun 30, 2005
4,787
132
I dont understand whats the size of the screw im attaching. The guy holding it says its "metric eight" size... what does that mean?
 

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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
4,787
132
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.
 
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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.
 
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