Originally Posted by
chagzuki
Hi,
I want to mod a Girvin Flexstem and I'm wondering whether most M6 bolts will use the same sort of thread specifications. Is the type used on bikes a specific specification. . . I guess it must be? I need a T bolt which obviously isn't a typical bike part and need to make sure the threads match those of the stem.
Originally Posted by
Booger1
Hate to pop your bubble but 6mm comes in .5 and .75 pitch also.Wiki isn't as smart as everyone thinks.
If it's threaded into aluminum,it's 6 x 1.0(coarse thread) coarse is almost always used on aluminum,unless it has an insert of some type.
Booger1 is not quite correct: the M6 to which the OP refers is one specific thread standard, the M in front of the 6 means that it uses ISO metric standard coarse pitch (1mm).
Booger's general thrust is correct in that there are other metric standards and some of them occasionally pop up on bikes: an example is the thread on the dust caps of your cranks if you still use square taper. These are metric standard fine, usually 22mm x 1mm or 24mm x 1mm.
BTW there are two "i"s in aluminium; although the second one is often not pronounced by Septics it's still there.