Originally Posted by camper1999
As you found out there are two types of metal stems. The bolt on ones are the ones to get.
Technically (but I won't promise you that everyone in the tire biz is trained well), the two types of valve stems you will encounter are either called clamp-in type or snap-in type in the tire industry.
The bolt/screw type are called clamp-in.
The type pictured in the OP (along with the confused TR600 HP stem pictured below) are snap-in.
A lot of people (even in the tire business for some reason) confusingly call this TR600 stem a metal stem. The cosmetic difference between this stem and what you are used to calling a rubber stem, is more of the internal brass part of the stem is exposed. This is helpful so this stem can easily be identified at first glance from a TR413 valve stem (pictured in the OP). The TR600 is made for high pressure (80-100 psi max depending on brand) applications vs a TR413 which is made for 60-65 psi max applications. Both the TR600 and TR413 are snap-in type stems. They are both 'rubber stems' per se.
A TR413 just has the entire brass part of the stem (except for the threaded tip where the valve cap screws on) covered in outer rubber as opposed to the TR600HP.
Using the correct terminology: clamp-in vs snap-in : should get you the correct stem (if you are dealing with knowledgeable tire industry professionals). It's when people start saying "metal" stems, wherein the confusion begins. It would be better to even say a bolt-in stem instead of "metal stem".
If you leave the term "metal stem" out, then you will probably make it easier to avoid the confusion and get the stem you want.
Have I bored ya silly?