Description
Stemco Pro-Torq spindle nut (447-4723) for trailer axles with 3.480 in.-12 spindle threads. The Pro-Torq is a single-piece nut and keeper assembly that locks bearing preload after a 1/8-turn final back-off, eliminating the dowel-pin alignment step required by traditional double-nut systems. Cross references include Meritor 1227-B-1484, Euclid E-2550, BWP M-1996, and Fruehauf ACE-8510-001.
Specifications
| Manufacturer | Stemco |
|---|---|
| Part Number | 447-4723 |
| Part Type | Pro-Torq Axle Spindle Nut |
| Thread Size | 3.480 in.-12 UN |
| Drive Style | 8-Point Socket |
| Socket Size | 4-13/16 in. (OTC 1941 / Euclid E-1597) |
| Replacement Keeper | Stemco 450-4723 |
| Zip-Torq Equivalent | Stemco 400-4723 |
| Final Back-Off | 1/8 turn |
Cross References
This part replaces or is equivalent to the following part numbers:
- Stemco: 400-4723 (Zip-Torq equivalent)
- Meritor: 1227-B-1484, 1227-K-1389
- Fruehauf: ACE-8510-001
- Euclid: E-2550
- Axilok: AX 12-3480
- BWP: M-1996
- Leland: L-1395
- Batco: 06-210, 06-226
- Ceromet: 348012
Applications
This Pro-Torq spindle nut fits trailer and heavy-duty axles using a 3.480 in.-12 spindle thread, including:
- Trailer axles with 3.480-12 threaded spindles (Hendrickson, Meritor, Dana, Fruehauf, ArvinMeritor, Stemco-supplied OEM trailer axle programs)
- Most standard-duty van, flatbed, tank, and refrigerated trailer axles using the 3.480-12 spindle profile
Verify spindle thread size, hub bore, and socket compatibility before ordering. The 8-point Pro-Torq socket (OTC 1941 / Euclid E-1597) is required for installation; 6-point or 12-point sockets will damage the nut flats.
