Spline Stub 1.750×16 Spline, 3.500 X .095 Tube – 4-40-721 – UDS
$70.69
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Description
4-40-721U UDS slip spline stub. 16 x 1.750″ spline, 3.000″ spline length, fits 3.500″ OD x 0.095″ wall tube, 3.312″ butt dia, 9.219″ end-to-weld.
Full Description
4-40-721U UDS Spline Stub — 1.750" x 16 Spline, 3.500" x 0.095" Tube
The 4-40-721U is a slip-style spline stub manufactured by UDS. It features a 16-spline bore at 1.750 inches in diameter with a spline length of 3.000 inches. The stub is designed for a 3.500-inch OD tube with a 0.095-inch wall. The butt diameter is 3.312 inches and the end-to-weld dimension is 9.219 inches.
Specifications
- Part Number: 4-40-721U
- Style: Slip
- Spline Count x Diameter: 16 x 1.750"
- Spline Length: 3.000"
- Tube OD: 3.500"
- Tube Wall: 0.095"
- Butt Diameter: 3.312"
- End to Weld: 9.219"
When fitting the 4-40-721U, confirm the mating slip yoke bore is 16 splines at 1.750-inch diameter, and verify the driveshaft tube is 3.500-inch OD with a 0.095-inch wall before welding. The 3.000-inch spline length sets the maximum engagement depth available with the mating slip yoke — check this against the required suspension travel.
The 9.219-inch end-to-weld dimension is the total stub shaft length from the splined end to the weld point. This longer stub is suited to two-piece driveshaft assemblies where the stub must extend further to accommodate the midshaft geometry. Confirm the tube ID matches the 3.312-inch butt diameter before completing the weld.
Additional information
| Tube dia | 3.500 |
|---|---|
| Tube wall | 0.095″ |
| Butt dia | 3.312 |
| Splines length | 3.000 |
| End to weld | 9.219 |
| Splines count dia | 16 X 1.750 |
| Style | Slip |
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| Stub & Midship Shaft (169) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | Partn number 1253-242 Butt dia 1.875 Splines count dia 24 x 0.995 End to weld 2.875 Style FIXED Notes use is with : 1204-241 nut sold sepratly: 858018 Tube dia 2.000 Tube wall 0.065" Length 1.180 Bearing dia 0.985 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
 | 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 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
