Spidertrax 1480 31 Spline Inner Shaft - Single 6-38 (Sa/Sb are Measured in Inches from Center of U-Joint to End of Shaft)  Spline Detail: 24/48 Pitch 45 Pressure Angle Fillet Root Side Fit  Shaft Diameter: 1.24  Material Spec: 300M Shaft w/ 4

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