Colony Machine Transmission Main Shaft Lock Nut - Harley Big 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 designed to secure the transmission mainshaft on Harley Big Twin V-twin motorcycles. Manufactured in the U.S.A., it provides the reliable fit and function needed for your driveline.
Why riders pick this
- OEM reproduction for Big Twin main shafts
- Made in the U.S.A. for dependable quality
- Secures transmission mainshaft components
- Sold individually for targeted replacement
When you're working inside the transmission, every component plays a critical role. This Colony Machine main shaft lock nut is crafted to OEM specifications, ensuring a precise fit and the necessary holding power for your Big Twin's transmission main shaft. It's a single, high-quality fastener that helps maintain the integrity of your motorcycle's gearbox, built right here in the U.S.A.
Reliable Transmission Fastening
- OEM reproduction specification for an accurate fit
- Manufactured in the U.S.A. for quality assurance
- Designed to secure the transmission mainshaft reliably
- Sold individually to replace a single worn or missing nut
Essential for Drivetrain Integrity
Properly securing the transmission main shaft is crucial for the smooth operation and longevity of your Big Twin. This lock nut ensures that key internal components remain correctly positioned under the stresses of riding. Whether you're rebuilding a transmission or performing maintenance, using a high-quality reproduction part like this from Colony Machine helps maintain factory performance. Always confirm specific fitment for your Big Twin model before undertaking any transmission work.
Specifications
- Brand: Colony Machine
- Manufacturer Part #: 2430-2
- Length: 5.75 in
- Width: 4.2 in
- Height: 0.45 in
- Weight: 0.09 lbs
Common questions
Is this an OEM Harley-Davidson part or an aftermarket reproduction?
This is an OEM reproduction part, manufactured to original equipment specifications by Colony Machine to provide a direct replacement for your Big Twin.
Do I need a special tool to install or remove this transmission lock nut?
Yes, a specific transmission mainshaft lock nut socket or spanner wrench is typically required for proper installation and removal of this fastener.
Will this lock nut fit my Harley-Davidson Sportster model?
No, this mainshaft lock nut is specifically designed for Big Twin V-twin engines. Sportster models use a different lock nut; please verify fitment for your specific motorcycle.
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 | 830-1155 |
| WEIGHT | 0.09 lb |
