The Dana 231502 is a genuine Spicer-brand drive-shaft (stub-shaft) retaining nut engineered for medium- and heavy-duty truck drivelines — typically used on driveline yoke, mid-ship, or output-shaft stub connections in 1610–1810 series systems.
- Thread size: 1.250-18 in — suitable for corresponding Dana/Spicer shaft assemblies
- Flange / nut geometry: Flanged-nut design with a flange diameter around 2.125 in and nut thickness ~0.63 in
- Material & construction: Hardened steel with self-locking feature, built to meet OEM standards for strength, durability, and resistance to loosening under heavy loads and vibration
- Torque spec (typical): Installation torque in the range of 700–750 ft-lb (or 475–525 ft-lb for alternate finish/nut type) depending on application and shaft series
