Attention:

Certain features of sigmaaldrich.com will be down for maintenance Saturday afternoon/evening, February 24th starting at 3:00 pm CT until 9:00 pm CT.

Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Labware Tutorials

Threaded Ground-glass Joint Tutorial

Image 1—A complete threaded ground-glass
joint.
  Image 2—It consists of an externally threaded female ground-glass standard taper joint and a corresponding male joint with threaded plastic nut.
 
Image 3—A plastic retaining ring loosens the
joint for safe disassembly.
  Image 4—The threaded plastic nut secures the joint without the use of clamps.
 
Image 5—The O-ring seals above the
ground-glass joint, eliminating the need for grease on the joint.