What size are M10 bolts?
Metric clearance and tapping drill hole sizes.
| Size | Clearance Hole mm | Tapping Drill (fine pitch) |
|---|---|---|
| M10 | 11 | 9.0 or 8.75 mm |
| M12 | 14 | 10.5 mm |
| M16 | 18 | 16.5 mm |
| M20 | 22 | 20.5 mm |
How is bolt spec measured?
To measure the diameter of screws and bolts, you measure the distance from the outer thread on one side to the outer thread on the other side. This is called the major diameter and will usually be the proper size of the bolt.
Is M10 a 10mm?
If the size is M10 x 25, that would mean that the diameter is 10 mm. Since there is no thread pitch listed, the fastener is assumed to have a coarse thread. The 25 indicated a length of 25 mm. A matching nut would be labeled M10, which also doesn’t require a thread pitch since it’s a course thread fastener.
Is a #8 or 10 screw bigger?
Machine screws are often found in sizes of: 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14—the larger the number, the larger the screw.
How do you specify a screw?
US fasteners specify threads per inch (TPI), commonly called thread count, so 20 would represent 20 threads per inch. Metric fasteners instead specify a thread pitch which is the distance between the threads. Therefore, a 1.5 pitch would have 1.5 millimeters between each thread.
What’s the difference between M10 and M12 bolts?
The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated “mm”). For nuts, size will appear as diameter and pitch….Table 3.
| Metric | Closest Inch |
|---|---|
| M7-1.0 | 1/4-28 (Smaller) |
| M8-1.25 | 5/16-18 (Smaller) |
| M10-1.5 | 3/8-16 (Smaller) |
| M12-1.75 | 1/2-13 (Larger) |
What is 10 mm bolt?
Metric Shoulder Bolt Dimensions
| Shoulder Diameter (A) | Thread (C) | Head Diameter (E) |
|---|---|---|
| 8mm | 6mm x 1.0 | 13mm |
| 10mm | 8mm x 1.25 | 16mm |
| 12mm | 10mm x 1.5 | 18mm |
| 16mm | 12mm x 1.75 | 24mm |