Upgrade or restore your classic Triumph motorcycle with this high-quality 5/16″-18 x 1-3/4″ Hex Head Crankcase Bolt (Part Number 14-6220). Engineered to meet original equipment specifications, this bolt is designed for secure and reliable engine assembly, ensuring the integrity of your crankcase.
Key Features
- Precision Fit: 5/16-inch diameter with 18 threads per inch (UNC), matching original Triumph specifications for a perfect fit.
- Durable Construction: Manufactured from robust materials for long-lasting performance and resistance to corrosion.
- Partially Threaded: Provides optimal clamping force and alignment, as required for crankcase assembly.
- Hex Head Design: Allows for easy installation and removal with standard tools.
- OEM Replacement: Direct replacement for Triumph part number 14-6220, compatible with a range of classic Triumph and BSA models.
Typical Applications
- Crankcase clamping bolt for Triumph unit twins and triples (including T120 Bonneville, T140, TR6, TR7) from 1968 onward.
- Used in engine bolt sets for 650cc Triumph engines (1969–1970).
- Suitable for various classic British motorcycles requiring this specification.
Specifications
- Part Number 14-6220
- Diameter 5/16 inch
- Thread Type UNC (Unified National Coarse)
- Threads Per Inch 18 TPI
- Length 1-3/4 inch (44 mm)
- Head Type Hex head
- Threading Partially threaded
Restore your vintage motorcycle with confidence—choose this authentic Triumph crankcase bolt for reliable performance and a factory-correct finish.
