Safe-Lab® Thermometer Joint Adapters-BEL F203091710

PTFE body with Viton® O-ring for airtight vacuum work. The adapter has a threaded polypropylene screw cap on top with an inside O-ring for depth adjustment of 6-7mm for straight stem thermometers, glass tubing and other items. Rotating the extracting nut removes the adapter from flask. The size 10/18 adapter has no body O-ring.