When it comes to identifying the specifications of a fitting, here’s a straightforward method to follow:

1,Double Ended Striaght Male Thread Hydraulic Fittings:

Start by selecting one end of the fitting.

Use a caliper gauge to measure the outside diameter (O.D.) to 18mm.

If this end resembles a ferrule type fitting, it’s indicative of either light or heavy-duty construction.

2.Tube Fitting Measurement:

Focus on measuring the inside diameter (I.D.), primarily in terms of C/D.

An 18mm ferrule can pair with either a 10 or a 12.

By measuring the inside diameter of the ferrule, determine if it’s light (C) or heavy (D).

For instance, an inside diameter close to 12mm suggests type C, with a code of 18.

3,Measuring the Other End

• Proceed to measure the outside diameter of the opposite end.
• If the caliper shows a measurement of 20.84mm and it’s not a ferrule type fitting, it likely doesn’t conform to the metric system.

• In the imperial system, the closest outside diameter is 21.5mm, indicating a 4-minute imperial fitting with a code of 08.

4,Combining the Data

• By amalgamating the collected data (1, C, 18, B, 08), conclude that the fitting is 1CB-18-08.

Remember, slight measurement discrepancies are normal. Refer to an imperial/metric fittings size comparison table for accuracy. If uncertainty persists, a tooth gauge can provide further confirmation.

By following these steps, you can confidently discern the specifications of your fitting.