Restore your classic Triumph motorcycle with the Triumph Bolt 5/16-22 x 1 3/4-Inch (PN# 70-4540)—a genuine OEM fastener engineered for precision and durability. This bolt is manufactured to original Triumph specifications, ensuring a perfect fit and reliable performance for vintage restoration or maintenance projects.
Key Features
- OEM Part Number: 70-4540
- Dimensions: 5/16 inch diameter, 22 threads per inch (TPI), 1 3/4 inch length
- Thread Type: CEI (Cycle Engineers Institute) standard
- Material: Steel (often available in stainless steel for enhanced corrosion resistance)
- Authentic Fit: Manufactured to match original Triumph factory standards for classic models
- Application: Designed for engine mounting, crankcase, or frame fastening (varies by model)
Benefits
- Authenticity: Maintains the originality and value of your vintage Triumph motorcycle by using period-correct hardware
- Reliable Performance: Engineered for strength and longevity, ensuring secure assembly in demanding engine or frame applications
Typical Applications
- Used as an engine mounting or crankcase bolt on various classic Triumph motorcycles
- Essential for restoration, repair, or replacement of worn or missing fasteners
- Ensures your restoration remains true to factory specifications, preserving both safety and authenticity
Upgrade your restoration project with the Triumph 70-4540 bolt—the trusted choice for enthusiasts seeking quality, reliability, and authenticity in classic British motorcycles.





