Dana Spicer companion flange part number 3-1-3971 or 313971 is a 1410 series drive shaft companion flange machined from steel. It carries 23 involute splines on a 2.750 in. female pilot diameter and mates to a 4-bolt pattern on a 3.75 in. bolt circle with 0.438 in. drilled bolt holes. The ground hub diameter measures 2.125 in., length through the bore runs 2.047 in., and flange face to end of hub is 2.609 in. This is a standalone flange, not a companion flange assembly. Pro Gear and Transmission sells this as a genuine Dana Spicer part. Call us to confirm proper fit for your driveline application.
Features
Dana Spicer 1410 series companion flange
23 involute splines, 2.750 in. female pilot diameter
4-bolt pattern, 3.75 in. bolt circle, 0.438 in. drilled bolt holes
Ground hub diameter: 2.125 in.
Length through bore (F): 2.047 in.; flange face to end of hub (G): 2.609 in.
Steel construction; standalone flange (not a companion flange assembly)
Tech Specs
- Series: 1410
- Material: Steel
- Invoice Description: Companion Flange
- Companion Flange Assembly: No
- Spline Count: 23 Involute Splines
- Involute Spline: Yes
- Pilot Diameter (C): 2.750 in. - Female
- Major Diameter (D): 1.520 in.
- Bolt Circle Diameter (B): 3.75 in.
- Bolt Hole Diameter: 0.438 in. - Drilled
- Number of Bolt Holes: 4
- Ground Hub Diameter: 2.125 in.
- Length Thru Hole (F): 2.047 in.
- Flange Face to End of Hub (G): 2.609 in.
