Phenolic Screw Threads with White Rubber Liner - 28-410 - 45066B-28

Cap is made of a special black phenolic material (mineral filled) to withstand the effects of repeated autoclaving. White rubber liner / cap bond was selected to retain its adhesive properties during autoclaving. This cap is threaded from the liner down approximately to half the total weight, except 38-430 which has full threads. The cap is identified in ASTM Specification E982, Class A requirements.