Spicer 2-53-691 Splined Midship Tube Shaft 1.375x16 spline, Ø3.000 X .065 tube General Design Type For use with Outboard Slip Yokes Spline Major Diameter D 1.375 Spline Count 16.000 Spline Type 15 Based On 16 Spline Bearing Diameter C 1.378 Tube Diameter and Wall Size 3.000 X .065 End of Spline to Bearing Shoulder Y 7.812 End of Spline to Point of Weld K 8.875 Length of Spline L 2.500 Thread Size Shoulder Diameter B 1.688 Length of Shoulder G 0.812