Restore or maintain your classic Triumph motorcycle with this 3/8″-16 x 4″ Crankcase Bolt (Part Number 14-6242). Designed to meet original factory specifications, this bolt ensures a secure and precise fit for critical engine assembly tasks.
Key Features
- Exact Specification: 3/8-inch diameter with 16 threads per inch (UNC), 4 inches in length, matching Triumph’s original requirements for crankcase junctions.
- Robust Construction: Manufactured from high-quality steel, providing strength and durability for demanding engine environments.
- OEM Replacement: Direct replacement for Triumph part number 14-6242, suitable for a range of classic Triumph 650cc and 750cc twin models.
- Critical Application: Used at the timing side crankcase junction, this bolt is essential for maintaining engine integrity and proper clamping force.
- Authentic Restoration: Ideal for restorations or repairs, ensuring your vintage motorcycle remains true to its original engineering.
Typical Applications
- Crankcase junction bolt for Triumph 650 and 750 twins, including models such as the Bonneville and TR7.
- Specifically used at the timing side crankcase junction, as referenced in Triumph parts catalogs from the late 1960s and 1970s





