This OEM flanged nut often used to secure the transmission mount to the transmission on Z32 vehicles with a manual gearbox. In this role it pairs with the corresponding mount‑to‑transmission bolt to clamp the mount bracket solidly against the transmission housing. Because it’s built to Nissan’s factory specifications for thread pitch and strength, it provides reliable clamping force and resistance to vibration‑induced loosening. It is commonly replaced during transmission mount service or drivetrain removal/reinstallation to ensure secure, long‑lasting fitment.

• USDM 300ZX (Z32): 1990–1996 (manual transmission models)
• JDM Fairlady Z (Z32): 1989–1996 (manual transmission models)