M7 Bolt Size and Thread Specifications
What is an M7 bolt?
An M7 bolt has 7 mm nominal major diameter. The usual ISO coarse pitch is 1.0 mm, with 0.75 mm fine pitch also seen in some applications.
M7 is less common than M6 or M8 but appears in some European equipment and specialty hardware. Confirm availability of matching nuts and wrenches before specifying. Spanish reference: perno M7.
Specifications
| Specification | Value |
|---|---|
| Nominal diameter | 7 mm |
| Standard pitch (coarse) | 1.0 mm |
| Fine pitch | 0.75 mm |
| Tap drill size | 6.0 mm |
| Closest imperial equivalent | between M6 and 1/4" |
Hex head size
| Bolt size | Hex head size |
|---|---|
| M7 | 11 mm |
Common uses
Special mechanisms, some bicycle components, and replacement parts that call out M7 on drawings.
Related tools
Related charts
FAQ
What is the standard pitch for an M7 bolt?
The common coarse pitch for M7 is 1.0 mm. Fine pitch is often 0.75 mm where specified.
What drill size should be used for tapping M7 threads?
For M7 x 1.0 coarse thread, use approximately a 6.0 mm tap drill. Use our Tap Drill Calculator for other pitches.
What imperial fastener is closest to M7?
between M6 and 1/4" is a practical reference for comparing M7 to inch hardware; verify fit for your application.
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