Flange Yoke Identifier

Use this guide if you don’t know your male or female style flange.

Male Flange
(Extended Pilot Hole)

Bolt Circle Diameter

Are the Holes: Threaded or Drilled

Is the Hole Pattern: Square or Rectangular

* Measure the major diameter (deepest part) inside the slip yoke.
** Some slip yokes have blank spaces called blind spots. Count each blind spot as one spline

Common Outside Snap Ring U-joint Sizes and series

Series	Width (IN.)	Cap Diameter. (IN.)
1210	2 – ⁷₁₆ (2.438)	1 – ¹₁₆ (1.063)
1310	3 – ⁷₃₂ (3.219)	1 – ¹₁₆ (1.063)
1310 FORD*	3 – ⁷₃₂ (3.219)	1 – ¹₈ (1.125)
1330	3 – ⁵₈ (3.625)	1 – ¹₁₆ (1.063)
1330 FORD*	3 – ⁵₈ (3.625)	1 – ¹₈ (1.125)
1350	3 – ⁵₈ (3.625)	1 – ³₁₆ (1.188)
1355 **
1410	4 – ³₁₆ (4.188)	1 – ³₁₆ (1.188)
1415**	4.178	1 – ³₁₆ (1.188)
1480	4 – ³₁₆ (4.188)	1 – ³₈ (1.375)
1485**	4.178	1 – ³₈ (1.375)
1550	4 – ³¹₃₂ (4.969)	1 – ³₈ (1.375)
1555**	4.964	1 – ³₈ (1.375)

* 1310 Ford & 1330 Ford have 1 – ¹₈” cap at pinion yoke and 1 – ¹₁₆” cap at driveshaft.
** 1415, 1485, 1555 only found on Chrysler and some GM vehicles with American Axle built driveshafts.

Female Flange
(Recessed Pilot Hole)

Bolt Circle Diameter

Pilot Hole Measurements: