Applicator closures
On this page9
The brush caps
BCA-18400-01 on an 18-400 neck and BCA-18410-01 on 18-410, both black PP. BCA-20400-01 on 20-400. BCA-28400-01 on 28-400. Four, and no others.
Which constrains the bottle before you choose it
If the product is brush-applied, the container has to be one of the ones carrying those four finishes. That is a far smaller field than the 234 on this shelf, and discovering it after ordering a case is the expensive way to learn it.
18 mm is small
Two of the four are 18 mm, which suits a nail-polish-scale applicator and a small bottle. For a wood glue or a varnish that is not the brush you want, which leaves 20-400 and 28-400 as the realistic options.
Spouted closures are the alternative
26 of them on this shelf. A spout gives a controlled bead from a squeezable bottle, which is exactly how a wood glue is used, and it does not carry a brush that sits in solvent between uses.
Flip tops for the thinner products
18 flip tops. A flip top meters a smaller amount than a spout and closes one-handed, which matters when the other hand is holding the work.
And a plain cap is always valid
284 continuous thread closures. A product applied with the user’s own brush, rag or spreader does not need an applicator at all, and a plain cap seals better than anything with a hole in it.
The brush that sits in solvent
A brush cap keeps its brush immersed in the product permanently. For a water-based glue that is fine. For a solvent finish it is a slow test of whether the bristle and the ferrule survive, and it is worth running that test before launch rather than after.
Applicator last, neck first
In practice this reverses the obvious order. Decide how it is applied, take the neck finish that allows it, then pick from the containers that carry that neck.