Upgrade or restore your classic Triumph motorcycle with this genuine 3/8″ x 4″ crankcase bottom bolt, engineered to meet original factory specifications for a precise fit and dependable performance.
Key Features
- Diameter: 3/8 inch
- Thread Pitch: 20 Threads Per Inch (TPI), British Standard Fine (BSF) or Unified National Fine (UNF) depending on application
- Length: 4 inches
- Part Number: 70-6929 (also referenced as E6929)
Applications
- Designed specifically for use as the crankcase bottom bolt on Triumph 650cc motorcycles, including popular models from the 1960s and 1970s
- Essential for securing crankcase halves, ensuring structural integrity and proper engine assembly
- May also fit select BSA and Norton motorcycles—always verify with your model’s parts manual
Benefits
- Manufactured to original Triumph specifications for authenticity and reliability
- Ideal for restoration projects and routine engine maintenance
- Ensures secure assembly, helping maintain engine alignment and performance
Compatible with a range of classic Triumph motorcycles—refer to your parts guide for details
