Colony Machine Transmission Main Shaft Lock Nut - Harley & Indian V-Twin
About Colony Machine
Colony Machine manufactures American-made fasteners and hardware kits for Harley-Davidson, including correct-finish reproduction hardware for restorations where a modern bolt would look wrong.
This Colony Machine transmission main shaft lock nut is an OEM reproduction fastener, made in the USA for V-twin motorcycles. It's designed to secure the transmission main shaft, ensuring proper drivetrain assembly and function. This single nut is a critical component for any transmission build or service.
Why riders pick this
- OEM reproduction for precise fitment
- Made in the USA for trusted quality
- Secures transmission main shaft
- Essential for V-twin drivetrain assembly
- Sold individually to meet your specific needs
When you're building or rebuilding a V-twin transmission, every fastener matters. This Colony Machine main shaft lock nut provides the peace of mind that comes with OEM-style fit and function. It's engineered to hold the main shaft firmly in place, preventing unwanted movement and maintaining the integrity of your drivetrain.
Precision-Engineered for Reliability
- OEM reproduction specification ensures a perfect fit
- Made in the USA for quality you can trust
- Secures the transmission main shaft against loosening
- Essential component for proper drivetrain assembly
Critical for Drivetrain Integrity
A loose main shaft can lead to catastrophic transmission failure. This lock nut is a small but vital component in preventing such issues, making it ideal for mechanics and DIY builders focused on long-term reliability. Pair it with other Colony Machine fasteners for a complete, factory-spec build.
Specifications
- Brand: Colony Machine
- Manufacturer Part #: 8408-1
- Length: 4.25 in
- Width: 0.25 in
- Height: 0.12 in
- Weight: 0.125 lbs
Common questions
Is this lock nut sold individually?
Yes, this transmission main shaft lock nut is sold individually. Order the exact quantity you need for your project.
Will this fit my Harley or Indian transmission?
This OEM reproduction nut is designed for V-twin transmissions. We recommend verifying your specific transmission type and part requirements using our Shop by Bike tool before ordering to ensure correct fitment.
What is the primary function of this lock nut?
The main shaft lock nut secures the transmission main shaft in place, preventing it from backing off or spinning loose during engine operation, which is critical for drivetrain stability.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Colony Machine |
| TYPE | Hardware/Fasteners/Fittings |
| SKU | 830-1185 |
| WEIGHT | 0.13 lb |
