PTFE Stirring Stopper, 19# With 20 mm Upper Diameter (CAT#: STEM-BC-3486-ZJF)

This 19# PTFE stirring stopper provides a sealed passage for a rotating stirring shaft. An internal O-ring helps preserve vessel tightness during operation. The PTFE contact surface reduces friction and supports flexible shaft rotation. Its structure is resistant to distortion under normal laboratory conditions. The stopper tolerates working temperatures up to 280°C. It resists strong acids, strong alkalis, and a wide range of organic solvents. Mechanical toughness is retained even at temperatures down to -196°C. The low-adhesion surface minimizes residue buildup and simplifies maintenance.

Specification: 19#
Upper diameter: 20 mm
Middle diameter: 19 mm
Lower diameter: 16.5 mm
Height: 46 mm
Material: PTFE
Seal: Embedded O-ring
Maximum stated working temperature: 280°C
Low-temperature performance: Retains stated 5% elongation at -196°C

Effective vessel sealing
Smooth stirring-shaft rotation
Low friction coefficient
Corrosion-resistant PTFE
High-temperature capability
Cryogenic toughness
Easy-to-clean surface
Long-term weather resistance

STEM-BC-3465-ZJF
STEM-BC-3466-ZJF
STEM-BC-3467-ZJF
STEM-BC-3468-ZJF
STEM-BC-3469-ZJF