How do I know what size ujoint I have (1310, 1330 or 1350 series)?
The series is determined by two measurements, the end cap diameter and the width of the ujoint. First, measure the ujoint end cap diameter, if it is 1 1/16" or 1 1/8" then you have either a 1310 or 1330 series. Because each one of these two can have either cap diameter or a combination of the both on a ujoint, you must measure the width of the ujoint to determine which series it is. Measure the width with the caps on, if you come up with 3 7/32" (just under 3 1/4"), you have a 1310 series and if you get 3 5/8", you have a 1330 series.
If you measured an end cap diameter of 1 3/16", then you have a 1350 series ujoint and the width will ALWAYS be 3 5/8".
The series is determined by two measurements, the end cap diameter and the width of the ujoint. First, measure the ujoint end cap diameter, if it is 1 1/16" or 1 1/8" then you have either a 1310 or 1330 series. Because each one of these two can have either cap diameter or a combination of the both on a ujoint, you must measure the width of the ujoint to determine which series it is. Measure the width with the caps on, if you come up with 3 7/32" (just under 3 1/4"), you have a 1310 series and if you get 3 5/8", you have a 1330 series.
If you measured an end cap diameter of 1 3/16", then you have a 1350 series ujoint and the width will ALWAYS be 3 5/8".