Heavy wall cylindrical and round bottom vessels have an internal thread for use with a 15 or 25mm fluoropolymer resin bushing as a pressure seal

This unique design allows hand tightening and loosening for easy access into the vessel. The O-ring is positioned on the bushing above the thread for improved sealing. The vessels are useful for pressure reactions and applications such as polymerization and analysis of halogens by thermal decomposition in the presence of lime.