2. Height Dimensions
Overall Height (H): * * The vertical distance from the top of the bottle cap to the bottom.
Internal Height: The depth of the internal space of the bottle cap must be able to accommodate the top of the bottle mouth and any internal stopper structure.
3. Thread Specification
Thread Form: The cross-sectional shape of a thread (such as circular, trapezoidal, triangular).
Number of Starts/Thread Leads: The number of threads (single head, double head, etc.) that affect the speed and feel of the screw cap.
Pitch: * * The distance between adjacent threads.
Turn Angle: * * The angle of rotation required from the beginning of rotation to complete tightening (such as 360 °, 540 °). This is related to the number of teeth and pitch.
4. Sealing System Dimensions
Liner Dimensions: * * If using independent gaskets (such as foam sheets, cork sheets), their outer diameter and thickness are critical dimensions.
Plug Dimensions: * * The inner plug diameter and depth as described above.
Induction Seal Dimensions: * * The diameter of the aluminum foil film.
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