Honda uses a range of metric bolt sizes across its lineup. For most passenger cars, common sizes run from M5 to M12 for general hardware, and wheel studs are typically M12×1.5 with lug nuts sized to fit the wheel. Exact sizes vary by model, year, and component.
Because Honda uses different engines and platforms, there is no single universal “Honda bolt size.” To replace fasteners accurately, consult the vehicle’s service manual, OEM parts diagrams, or get the fastener size stamped on the bolt itself. This article provides a general guide to what you’re likely to encounter.
Common bolt sizes you’re likely to encounter
Below is a guide to typical bolt sizes used across many Honda models, noting that exact sizes vary by model and year.
- Small interior and body fasteners: typically M5 or M6 for trim panels, seat brackets, and light-duty components.
- Engine bay and suspension brackets: commonly M8 or M10 for mounting points and covers.
- Major engine and drivetrain fasteners: often M10–M12, with some high-torque applications using different sizes depending on the engine family.
- Wheel-related hardware: wheel studs are typically M12×1.5; lug nuts are sized to fit the wheel and can vary in seat design and hex size by model.
For precision, verify sizes with the service manual or OEM fastener charts for your specific Honda model and year.
Notes by model family
Honda’s engine families—such as D-series, B-series, K-series, and newer Earth Dreams engines—use fasteners that follow common metric standards but differ in torque specs, thread lengths, and head types. Always consult factory diagrams for the exact bolt type and size when replacing fasteners on a given engine or chassis.
Wheel and maintenance tips
If you’re replacing wheel studs or lug nuts, use OEM or grade-appropriate hardware, ensure clean threads, and apply the correct torque per the service manual. Using incorrect size or pitch can create safety risks.
Summary
Honda uses a spectrum of metric bolt sizes, typically ranging from M5 to M12 for general hardware, with wheel studs commonly M12×1.5. Exact sizes depend on model and year, so always check the official manual or parts diagrams for your vehicle before purchasing or installing fasteners. When in doubt, opt for OEM fasteners to ensure proper thread pitch, length, head design, and torque specifications.