KECK CLIPS
- These are sturdy Keck Clips (joint) in a variety of colours and is useful for connecting Quickfit equivalent jointed glassware.
- Sold singly.
(Wikipedia excerpt: …”Joint clips (or Keck clips)[1] are used to prevent laboratory glassware joints from separating during a reaction process. They are used to secure the two sides together and are available in a variety of materials for different temperature and chemical environments.
Plastic joint clips are usually made of polyacetal, and are colored according to joint sizes. Polyacetal melts at a reasonably low temperature (around 175 °C) and begins to soften around 140 °C. Polyacetal clips suffer another problem in that the material is strongly affected by the corrosive gases. Color-coded plastic joint clips were invented by Hermann Keck in 1980.[1] Hence, they’re also referred to as “Keck clips”.[1]
Polytetrafluoroethylene (PTFE) joint clips are sometimes used, as its recommended temperature peak matches that of most chemistry work. Its highly inert nature also makes it immune to degradation around corrosive gases. However, it is both expensive and will begin producing hydrogen fluoride if heated to beyond its specified temperature. The same is true of using Krytox and chemically resistant Molykote (PTFE thickened, fluoro-based) oils and greases for glassware seals…”)
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