ProSpin 8mm x 1.25 Prop Nut with 8mm Bushing (PN82)
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ProSpin 8mm x 1.25 Prop Nut with 8mm Bushing
The ProSpin 8mm x 1.25 Prop Nut with 8mm Bushing is a replacement or alternate-fit mounting set for compatible ProSpin aluminum spinner installations. It includes an 8 mm prop nut with a 1.25 mm metric thread pitch and a matching 8 mm bushing.
Choose the PN82 when your engine or motor has an 8 mm x 1.25 mm threaded propeller shaft. ProSpin replacement prop nuts are selected according to the shaft thread required by the engine or motor, rather than spinner diameter alone.
✅ Product Highlights
- Replacement or alternate-fit prop nut for compatible ProSpin spinners
- 8 mm metric thread diameter
- 1.25 mm metric thread pitch
- Includes a matching 8 mm bushing
- Selected according to the engine or motor shaft thread
- MPI Products part number PN82
📏 Choosing Between the PN81 and PN82
ProSpin offers two prop nuts with an 8 mm diameter. The thread pitches are different, so the two parts are not interchangeable.
| Part Number | Shaft Thread | Bushing |
|---|---|---|
| PN81 | 8 mm x 1.0 mm | 8 mm |
| PN82 — This Model | 8 mm x 1.25 mm | 8 mm |
Important: Both parts have an 8 mm diameter, but the spacing between their threads is different. The correct choice must match the complete shaft specification.
Understanding the 8mm x 1.25mm Size
- 8 mm: Nominal thread diameter
- 1.25 mm: Distance between the metric threads
- 8 mm bushing: Matching bushing supplied with the prop nut
Compatibility
The PN82 is intended for compatible ProSpin spinner installations on an engine or motor with an 8 mm x 1.25 mm threaded propeller shaft. Engine and motor specifications may vary, including between models from the same manufacturer.
- Compatible shaft thread: 8 mm x 1.25 mm
- Included bushing size: 8 mm
- May replace a standard ProSpin prop nut when this shaft thread is required
- Not compatible with an 8 mm x 1.0 mm shaft
- Not a universal-fit prop nut
- Spinner and propeller are not included
View Technical Specifications
| Brand: | ProSpin |
| Manufacturer: | MPI Products |
| Part Number: | PN82 |
| Component Type: | Spinner prop nut and bushing |
| Thread Diameter: | 8 mm |
| Thread Pitch: | 1.25 mm |
| Bushing Size: | 8 mm |
Package Includes
- 1 x ProSpin 8mm x 1.25mm prop nut
- 1 x 8mm bushing
ProSpin spinner, propeller, engine, motor, and additional mounting hardware are not included.
💡 Modeler’s Tip
The correct prop nut should engage the shaft smoothly by hand. Never force it. If the nut binds immediately, stop and verify whether the shaft uses a 1.0 mm or 1.25 mm thread pitch.
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