Cam and Groove Couplings, or Cam-Lok fittings, are used to connect two hoses together in a multitude of industries. They’re easy to use, requiring no tools to connect and disconnect the two halves of the couplings.- just some man strength. They’re an extremely versatile product, and because there are no threads on the coupling halves, there are no issues with them becoming dirty or damaged. This means camlock couplings are very suitable for messy settings. Here is a quick guide to Cam-Lok fittings – with pictures!