metric eight size?

[zoran]

I dont understand whats the size of the screw im attaching. The guy holding it says its "metric eight" size... what does that mean?

 

[D.T.]

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]

Thanks but i dont understand what you say... "variant in the thread" and "fine vs. course"... what are you trying to say?

 

[D.T.]

Thanks but i dont understand what you say... "variant in the thread" and "fine vs. course"... what are you trying to say?

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.

 

[jeyf]

most cities have several industrial supply houses that specialize in fasteners. Pick one with good with counter service.

 

[DeltaMac]

"... fine vs. course ...", should be "... fine vs. coarse ... ", which is the relative measurement of thread pitch.

Fastener Basics

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