2) Skirt Type: Look at the end of the connector where the contacts are located. There are only 2 types of skirts available. If you see threads on the outside with 2 grooves approx. 90 degrees apart on the inside you have a female skirt. If the outside is smooth with 2 tabs approx. 90 degrees apart you have a male skirt.

3) Skirt Length: Measure the length of the skirt.

4) Shell Size: Measure the diameter of the skirt.

On the table below, follow the male or female skirt column down until you find the size you measured. Then look to the right to find out the shell size. Enter this number on the form.
 

5) Insert Gender: If you see exposed contacts on the inside of the skirt you have a male insert. If all you see is a plastic housing with holes you have a female insert.