Restore your classic Triumph 500cc twin with confidence using this high-quality Cylinder Head Bolt, engineered for C Range models from 1961 to 1974.
Key Features
- Exact Fitment: Manufactured to original Triumph specifications for 3/8″ diameter, 2-3/4″ length, and 26 threads per inch (TPI), ensuring a precise fit for your engine assembly.
- OEM Quality: Produced in the UK to meet or exceed factory standards, this bolt is ideal for authentic restorations and reliable repairs.
- Durable Construction: Made from robust, high-tensile steel, providing superior strength and resistance to stretching or failure under engine loads.
- Corrosion Resistant: Finished for enhanced protection against rust, extending the longevity of your engine rebuild.
- Easy Installation: Designed with the correct head profile for straightforward installation and removal during maintenance.
Applications
- Suitable for Triumph 500cc C Range unit twins, including models such as the T100, 3TA, and 5TA (1961–1974).
- Intended for use as a cylinder head bolt in classic Triumph twin engines.
Why Choose This Bolt?
- Authentic Restoration: Faithfully reproduces the original Triumph part (PN# 70-3794), maintaining your motorcycle’s historical integrity.
- Trusted by Enthusiasts: A preferred choice among classic Triumph restorers and professional mechanics for its reliability and fit.
Upgrade your Triumph’s performance and ensure a secure, leak-free seal with this premium cylinder head bolt—crafted for longevity and peace of mind


