The quick answer: a "10mm bolt" is an M10 bolt, meaning the shank diameter is 10 millimeters. On most Honda applications, the typical thread is M10x1.5 (a coarse 1.5 mm pitch), though some parts may use different pitches or diameters. Always verify with the service manual or by comparing the bolt to an OEM specification.
In practice, bolt sizing in Hondas involves four factors: diameter, thread pitch, length, and head style. While a 10 mm diameter is common, the exact pitch, length, andhead type vary by model, year, and the specific assembly being fastened. Using the correct size is essential for safety and proper torque performance.
Decoding the size on a Honda
Understanding what the numbers mean helps you source the right fastener and avoid mismatches that can affect performance or safety.
To identify the correct bolt size for a given Honda part, follow these steps:
- Remove the bolt and clean the threads to inspect the diameter and pitch clearly.
- Measure the bolt’s diameter with calipers or a micrometer to confirm it is around 10 mm for an M10 bolt.
- Determine the thread pitch by counting threads per millimeter or using a pitch gauge; the standard Honda practice for many M10 bolts is 1.5 mm (M10x1.5), though some assemblies may use 1.25 mm or other pitches.
- Measure the length from under the head to the tip (including any shoulder) to match the required engagement.
- Check the bolt’s grade or strength marking (e.g., 8.8, 10.9) to ensure it meets the load requirements of the assembly.
Replacing with the correct size is crucial for safety and reliability; if you’re unsure, consult the Honda service manual or contact a dealer for OEM fasteners.
Common sizes you may encounter on Hondas
While the 10 mm diameter is common, Hondas use a range of metric sizes across models. The following sizes are frequently seen, but exact specs vary by model and year:
- M6x1.0 — small brackets, sensors, interior trims
- M8x1.25 or M8x1.0 — engine covers, auxiliary brackets, some suspension components
- M10x1.5 — many engine mounting bolts, transmission screws, and body mounts
- M12x1.75 — larger mounting points and structural fasteners on some models
Always verify by inspecting the existing fastener or checking the official service manual; OEM bolts may differ in length, head type, or specific pitch.
Summary
In short, a 10mm bolt on a Honda typically refers to an M10 bolt, usually with a 1.5 mm thread pitch (M10x1.5). However, some parts may use fine threads or different diameters. Always confirm with measurements, the service manual, or OEM specifications to ensure a proper fit and safe operation.
Will 7/16 work for 10mm?
If the bolt is 10mm, you could use a 7/16, which is bigger than 10mm, and then slip in a dime so there's no gap.
What size bolts do Hondas use?
For example, the most common metric thread sizes of Honda bolts are M12x1. 5mm and M14x1. 5mm. A M12 means the width of the thread area and a 1.5mm means the thread pitch.
Is a #10 bolt 10mm?
The size designation helps in identifying the right bolt for the specific application, ensuring a secure and reliable fastening. Overview: M10 bolts have a 10mm diameter, making them suitable for heavy-duty applications.
What tool do I need to remove a 10mm bolt?
10- mm Bolt Biter™ Nut Extractor & Driver. The GEARWRENCH Bolt Biter™ nut drivers are designed with innovative features to grip rounded out, frozen, and damaged fasteners.