How to Use a Grease Fitting Thread Tester

If you work with SAE, metric, National or British Pipe Thread grease Zerks, the Thread Tester will save you lots of time and frustration. When you're running multiple machines with a variety of grease fittings, or replacing a fitting for the first time, it becomes increasingly difficult to keep track of what's what. The thread tester provides a quick and easy way to tell all of your different grease fittings apart from one another.