Companion Flanges
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Image | Add | Part Number | Splines count | Splines dia / Bore Dia | Hub Dia | Through hole | Pilot dia | Bolt Holes | Face To End | Keyway | Bolt Circle Dia | Outside Dia | Brand | Notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 1.250 | 2.375 | 0.312 | 3.125 | 3.875 | UDS | ||||||||
| | 23 | 0.990" | 1.500" | 1.530 | 1.808 | 4 | 2.234 | 3.340 | Toyota Mid-ship, SQ | |||||
| | 28 | 1.218 | 1.812 | 1.252 | 2.000 | 8 | 1.985 | 3.50/4.250 | Dual bolt pattern | |||||
| | 32 | 1.401 | 1.943 | 2.000 | 2.000 | 4 | 4.000 | 4.250 | Front 07-17 JEEP JK T-case Adapter, can use 3594-2000U, M12-1.75mm , 4 holes drilled for M12 | |||||
| | 32 | 1.401 | 1.943 | 2.000 | 2.000 | 4 | 2.530 | 4.250 | Rear 2007-2017 JEEP JK T-case Adapter, can use 3594-2000U, M12-1.75mm, 4 holes drilled for M12 | |||||
| | 26 | 1.146 | 1.400 | 1.535 | 3.937 | 6 | 3.170 | 3.386 | Uses 2352-1001 (plunge) | |||||
| | 23 | 990 | 1.495 | 1.540 | 3.937 | 6 | 3.170 | 3.386 | Uses 2352-1001 (plunge) | |||||
| | 3.750 | 2.500" | 3.750F | 4 | 0.375 | 4.750 | 5.880 | Hole config: 3.053" x 3.639" | ||||||
| | 26 | 1.146 | 1.554 | 1.535 | 3.937 | 6 | 3.170 | 3.386 | Uses 2352-1001 (plunge) | |||||
| | 32 | 1.401 | 2.125 | 2.000 | 2.000 | 8 | 2.125 | 3.5, 4.25 | Counterbore depth .421", USE WITH: 3594-2000U or equv. Ford NP205 NP203, M12-1.75mm | |||||
| | 10 | 1.500 | 1.772 | 2.000 | 2.245 | 4 | 3.455 | 4.000 | Sprinter, threaded bolt holes, male pilot | |||||
| | 30 | 1.312 | 1.812 | 1.250 | 2.000 | 8 | 1.588 | 3.50 / 4.25 | Ford 8.8, Dual threaded bolt patterns | |||||
| | 31 | 1.343 | 1.812 | 1.640 | 2.000 | 8 | 1.955 | 3.50 / 4.25 | Dual threaded bolt patterns, M12-1.75mm, Superduty transfer case, typically 3594-2000U | |||||
| | 29 | 1.263 | 1.875 | 1.500 | 2.161 | 8 | 2.000 | 3.937 | Chy 9.25, threaded bolt holes | |||||
| | 31 | 1.387 | 2.205 | 1.469 | 2.953 | 4 | 2.500 | 4.750 | Ford Transit Flex coupler to flange conversion (3502-1859, 4102-1839) | |||||
| | 29 | 1.276 | 1.875 | 1.500 | 2.000 | 8 | 2.000 | 4.250 | Dana 60, 70 Pinion Conversion Flange | |||||
| | 32 | 1.401 | 1.943 | 2.000 | 2.000 | 4 | 2.530 | 4.250 | Rear 2007-2017 JEEP JK T-case Adapter | |||||
| | 10 | 1.750" | 2.148 | 2.728 | 3.150 | 4 | 2.717 | 4.343 | Isuzu / Mates with 4802-1244 | |||||
| | 32 | 1.401 | 1.943 | 2.000 | 2.000 | 4 | 3.810 | 4.250 | Front 2007-2017 JEEP JK T-case Adapter | |||||
| | 32 | 1.401 | 2.125 | 2.000 | 1.808 | 0 | 2.250 | Blank | 5.475 OD |
Category Information
The companion flange is the interface between the driveshaft and the differential pinion shaft, and its condition has a direct impact on the health of the entire rear drivetrain. A companion flange with worn pilot bore, damaged bolt holes, or a scored seal surface creates problems that cascade — runout at this joint feeds directly into U-joint wear, and a leaking pinion seal due to a damaged flange surface is a contamination risk for the entire differential. Our companion flanges are machined to maintain correct pinion shaft fitment, true bolt circle geometry, and a clean seal surface that allows the pinion seal to do its job. Available for common rear axle applications in both OEM-replacement and upgraded configurations.
