Triumph Hex Head Rear Crankcase Bolt 5/16-inch-18 x 2-1/2-inch PN# 21-1869

Restore your classic Triumph motorcycle with this precision-engineered 5/16″-18 x 2-1/2″ Hex Head Rear Crankcase Bolt. Manufactured to meet original equipment standards, this bolt is designed for secure engine assembly, ensuring the integrity and longevity of your crankcase. Key Features Exact Fit: 5/16-inch diameter with 18 threads per inch (UNC), matching Triumph’s original specifications for a seamless installation. Durable Construction: Made from high-quality steel, often zinc plated for enhanced corrosion resistance and lasting performance. Hex Head Design: Facilitates easy tightening and removal using standard tools, making maintenance straightforward. OEM Replacement: Direct replacement for Triumph part number 21-1869, compatible with a wide range of classic Triumph models. Authentic Restoration: Ideal for restoration projects, maintaining the correct appearance and function of your vintage motorcycle. Typical Applications Rear crankcase bolt for Triumph 650cc and 750cc engines, including T120 Bonneville, TR6, T140, and TR7 models. Used to clamp crankcase halves together, ensuring proper engine assembly and structural integrity. Specifications Part Number 21-1869 Diameter 5/16 inch Thread Type UNC (Unified National Coarse) Threads Per Inch 18 TPI Length 1-7/8 inch (47.6 mm) Head Type Hex head Typical Use Rear crankcase bolt (Triumph 650/750) Choose this genuine Triumph rear crankcase bolt for reliable performance and a factory-correct finish on your classic motorcycle engine assembly. The product images shown are for illustrative purposes only and may not be an exact representation of the product received. Manufacturers occasionally make minor cosmetic changes to items, such as color, finish, label, or design. These changes do not impact the item’s function or compatibility. Please contact us if you have specific concerns regarding appearance.