OEM Collar Nut M12x1 for KTM, Husqvarna & GasGas 1994-2026 - 49030021000

This genuine OEM collar nut (M12x1) is a critical fastener used across multiple systems on your motorcycle. It is designed to provide a secure, vibration-resistant hold for high-stress components such as the crankshaft and ignition assembly. As an original equipment manufacturer part, it ensures perfect fitment and meets the strict material specifications required for engine and drivetrain reliability.

This versatile nut is compatible with an extensive range of models including the KTM 125 SX, 250 EXC, 300 XC, 450 SX-F, and 500 EXC-F from 1994 to 2026. It also fits Husqvarna TC, TE, FC, and FE models, as well as GasGas EC, EX, and MC series bikes. Whether you are working on a vintage 1990s two-stroke or a modern 2026 four-stroke rally replica, this part is the standard replacement for many 125cc to 530cc engines.

Manufactured from high-grade steel, this M12x1 collar nut features a built-in flange that acts as an integrated washer. This design distributes pressure more evenly across the mating surface, preventing loosening during high-RPM operation. The precision-cut threads ensure smooth installation and consistent torque application every time.

When replacing this nut, always refer to your service manual for the specific torque settings required for your model. It is recommended to inspect the threads on the shaft for damage before installation to ensure a proper seal. Using a genuine OEM fastener is the best way to maintain the structural integrity of your engine's rotating assembly.

Check compatibility list below to see if this part fits your motorcycle model.