A closure is not a package
Updated
On this page7
What gets tested
A specific closure on a specific container, as a system. The thread engagement, the wall stiffness, the finish tolerance and the way the two parts interact all affect whether a child can defeat it, and all of them change when either half changes.
Which means parts are not interchangeable
The same CR closure on a different bottle is a different package and is untested. A stiffer or softer container wall, a slightly different neck, or a different liner can move the result in either direction, and nobody can tell by looking.
What we actually sell
Components. The catalog holds 71 child-resistant closures across ten neck finishes, and they can form part of a compliant package once that combination has been tested. They are not a compliant package on their own and we do not describe them as one.
And an honest note about matching
Across the rest of this library, container pages list closures verified against the neck. Those 71 are not in that verified set, so what we can say here is that the neck notation matches, which is a weaker claim. For anything that matters, confirm the fit physically before committing.
Why the distinction is worth laboring
Because the failure is invisible and the consequence is a child opening a bottle. Somebody who believes they have a compliant package because they bought a CR cap has a false sense of a real protection, which is worse than knowing they have none.
If compliance is required, buy the tested combination
From a supplier who has had that package tested and will say so, or have the testing done. That is the route, and there is not a shortcut through parts selection.