N3-40-2512 Super Duty Solid Butt Fits Tube 2.500×0.120 Can Be Machined To Any Tube Size – HARDENED SPLINES 7.000″ End To Weld 8.876″
$83.08
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Description
N3-40-2512 super duty solid butt stub shaft, hardened splines, 16×1.500″ spline, 2.500″x0.120″ tube, 2.270″ butt dia, 8.760″ end-to-weld. Can be machined to other tube sizes. Verify tube OD/wall and mating slip yoke spline spec before ordering.
Full Description
N3-40-2512 Super Duty Solid Butt Stub Shaft 16x1.500 Spline Fits 2.500x0.120 Tube
The N3-40-2512 is a super duty solid butt stub shaft with hardened splines, designed for welding into 2.500" OD x 0.120" wall driveshaft tubing. The splined end carries 16 splines at 1.500" diameter with an active spline length of 6.530" and a noted spline engagement depth of 7 inches. The solid butt configuration — butt diameter 2.270" — is machined to fit inside the 2.500" tube OD before welding, with an end-to-weld length of 8.760". Per the product notes, this is a solid butt design with 7-inch spline length and hardened splines for increased wear resistance.
Specifications
- Part Number: N3-40-2512
- Style: Slip (Solid Butt)
- Splines Count x Diameter: 16 x 1.500"
- Spline Length: 6.530" (7" per notes)
- Tube Diameter x Wall: 2.500" x 0.120"
- Butt Diameter: 2.270"
- End to Weld: 8.760"
- Notes: Spline length 7 inch — Solid Butt. Can be machined to any tube size.
When fitting the N3-40-2512, the butt diameter of 2.270" fits inside 2.500" tube ID after accounting for wall thickness; with 0.120" wall on a 2.500" OD tube, the ID is approximately 2.260" — confirm the butt-to-tube clearance is within your welding specification before assembly. The notes indicate this stub can be machined to accept other tube diameters, but verify machining limits with the supplier before reducing the butt below spec. The 8.760" end-to-weld dimension establishes how deep the stub seats into the tube end.
The N3-40-2512 is a slip-style stub shaft — the 1.500" x 16-spline bore accepts a matching slip yoke that slides over these splines during driveshaft operation. Hardened splines on the N3-40-2512 are critical in high-torque or frequent-slip applications where standard splines would wear prematurely. Verify the mating slip yoke carries a 1.500" x 16-spline bore before pairing with this stub shaft. Confirm tube OD and wall spec match 2.500" x 0.120" before welding the N3-40-2512 into the tube assembly.
Additional information
| Bearing dia | N/A |
|---|---|
| Butt dia | 2.270 |
| End to weld | 8.760 |
| Splines count dia | 16 x 1.500 |
| Splines length | 6.530 |
| Tube dia wall | 2.500X0.120 |
| Notes | SPLINE LENGTH 7 Inch – SOLID BUTT |
| Partn number | N3-40-2512 |
| Tube dia | 2.500 |
| Tube wall | 0.120 |
| Style | Slip |
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 | Butt dia 2.375 End to weld 3.125 Notes USE WITH: 1204-261 , Uses 858018 nut Partn number 1253-261 Splines count dia 26 x 1.115 Splines length 1.120 Tube dia 2.500 Tube wall 0.065" Style FIXED | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Bearing dia 1.181 Butt dia 1.875 End to weld 2.875 Notes USE WITH: 1204-261 , Uses 858018 nut Partn number 1253-262 Splines count dia 26 x 1.115 Splines length 1.180 Tube dia 2.000 Tube wall 0.065" Style FIXED | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Bearing dia 1.181 Butt dia 2.375 End to weld 6.625 Notes This stub also has snap ring groove at 16mm to retain bearing. USE IT WITH: 2252-682 Partn number 1254-681 Splines count dia 19 X 0.850 Splines length 0.775 Tube dia 2.500 Style CVJ Tube wall 0.065" | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Bearing dia 1.181 Butt dia 2.344 End to weld 6.625 Notes use it with: 2252-682 Partn number 1254-683 Splines count dia 19 X 0.850 Splines length 0.775 Tube dia 2.500 Tube wall 0.083" Style CVJ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Butt dia 2.435 End to weld 7.500 Notes TOYOTA Partn number 1340-20 Splines count dia 20 X 1.310 Splines length 1.765 Tube dia 2.560 Tube wall 0.065" Style Slip | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Butt dia 2.435 End to weld 9.375 Notes Toyota, Sold only in kit 1343-20L Partn number 1340-20L Splines count dia 20 X 1.310 Splines length 6.500 Tube dia 2.560 Tube wall 0.065" Style Slip | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Butt dia 2.435 End to weld 6.375 Notes TOYOTA Partn number 1340-21 Splines count dia 20 X 1.310 Splines length 1.880 Tube dia 2.560 Tube wall 0.065" Style Slip | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Bearing dia 1.181 Butt dia 2.435 End to weld 5.000 Notes Fits Toyota OE Tube / 1374-233 nut included ⋅ Use with: 1301-231 Partn number 1353-231 Splines count dia 23 X 0.990 Splines length 1.375 Tube dia 2.560 Tube wall 0.065" Style FIXED | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Bearing dia 1.181 Butt dia 2.344 End to weld 5.000 Notes Fits Toyota OE Tube / 1374-233 nut included ⋅ Use with: 1301-231 Partn number 1353-232 Splines count dia 23 X 0.990 Splines length 1.375 Tube dia 2.500 Tube wall 0.083" Style FIXED | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
