Restore your classic Triumph motorcycle with this authentic Triumph 5/16″-22 x 1 7/8″ BSF Crankcase Bolt (PN# 70-4098). Manufactured to original specifications, this bolt is essential for anyone seeking reliability and period-correct detail in their engine assembly.
Key Features
- Exact Fit: Designed for Triumph 650 unit twins from approximately 1967 to 1968, including models like the T120 Bonneville, TR6, and Tiger.
- Quality Construction: Produced in the UK from durable materials to ensure lasting performance and resistance to corrosion.
- Precision Threads: Features a 5/16″ diameter with 22 threads per inch, using the British Standard Fine (BSF) thread pattern unique to vintage British motorcycles.
- Critical Application: Specifically intended for securing the crankcase halves, helping maintain engine integrity and proper assembly.
- Authentic Restoration: Ideal for classic motorcycle restorations, preserving the original look, feel, and mechanical reliability of your Triumph.
Specifications
- Part Number 70-4098
- Diameter 5/16 inch
- Thread 22 TPI, British Standard Fine (BSF)
- Length 1 7/8 inches (48 mm)
- Application Crankcase bolt
- Compatibility Triumph 650 unit twins (circa 1967–1968)
Why Choose This Bolt?
- Ensures a secure and precise fit for your engine assembly.
- Maintains authenticity and safety for your classic Triumph.
- Trusted by restorers and mechanics for accurate, reliable restoration projects.
Note: Always verify compatibility with your specific model using the official parts manual before installation. This bolt is sold individually and is also available as part of comprehensive engine hardware kits.
