This OEM alternator stopper nut is used on the Z32 chassis as part of the alternator mounting and adjustment assembly. It functions as a securing fastener on the alternator bracket, helping lock the adjustment mechanism in place once proper belt tension is set. By preventing movement of the alternator under load, it ensures consistent belt alignment and reliable charging system operation.
- USDM 300ZX (Z32): 1990–1996 (VG30DE & VG30DETT – NA or TT)
- JDM Fairlady Z (Z32): 1989–1996 (VG30DE & VG30DETT – NA or TT)
- Fits VG30DE & VG30DETT engines (NA or TT)
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