120/400 White Smooth Straight PP Cap / F217 Liner

Likely development programs include cosmetics, personal care, wellness, supplements, household, and specialty products. Even on the same neck finish, liner thickness and thread engagement can materially change seal performance. For Part 138250, the central question is how the packaging closure behaves in the assembled package. Qualification should cover thread engagement, liner compatibility, line application, and expected storage conditions. This keeps sourcing decisions tied to measurable package requirements.