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“H”
Dimension: The height of the neck finish. Measured from the
top of the neck to the point where the diameter, “T”,
extends down and intersects the shoulder.
“S” Dimension: Measured from the top of the finish
to the top edge of the first thread. The “S” dimension
is the key factor in determining the orientation of the closure
to the bottle and the amount of thread engagement between
the bottle and cap.
“I” Dimension: The inner diameter of the bottle
neck. Specifications require a minimum “I” to allow
sufficient clearance for filling tubes. Linerless closures,
with a plug or land seal, and dispensing plugs and fitments
require a controlled “I” for a proper fit.
“T” Dimension: The outside diameter of the thread.
The tolerance of the “T” dimension determines the
mate between bottle and closure.
“E” Dimension: The minor diameter measured across
the root of the threads.
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