E4 Black Phenolic Eclipse Cap F217

Phenolic rigidity supports a precise feel, but liner selection and torque remain central to reliable sealing. Product teams may consider it for prestige beauty, wellness, pharmaceutical, supplement, and specialty-product packaging. When the brief calls for a well-defined compression-molded closure, Part 134640, the E4 Black Phenolic Eclipse Cap F217, provides a practical specification to evaluate. Qualification should cover thread engagement, liner compatibility, line application, and expected storage conditions.