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What does M8 bolts mean?
M8 is the designation for a metric (M) sized bolt or screw that is 8mm (8) in diameter. The M before a number stands for metric. The next number is the diameter size. For example, M8 is a metric screw and has a diameter of 8mm.
Are M8 and 5/16 the same?
Well, quick answer is no. They are not the same and they are not interchangeable, although they can work under certain circumstances. The most important part is understanding the meaning of M8 and 5/16 to refer to the size of a metric screw or bolt, so then we can see why they aren’t the same thing!
Are M8 bolts 8mm?
Hole Sizes for Metric Bolts So an M8 bolt would have a shaft diameter that’s slightly under 8mm which means that the bolt should fit through an 8mm hole. For example, an M8 bolt with a standard coarse thread pitch of 1.25mm would require a hole of 6.75mm diameter to be tapped.
How thick is a M8 bolt?
Dimensions for DIN931 Hex Head Bolt
| Diameter (d) | Pitch | Head Depth (k) |
|---|---|---|
| M5 | 0.8mm | 3.5mm |
| M6 | 1.0mm | 4mm |
| M7 | 1.0mm | 4.8mm |
| M8 | 1.25mm | 5.3mm |
What size bolt is M8?
Metric clearance and tapping drill hole sizes.
| Size | Clearance Hole mm | Tapping Drill (std Pitch) |
|---|---|---|
| M6 | 6.5 | 5.0 mm |
| M8 | 9 | 6.75 mm |
| M10 | 11 | 8.5 mm |
| M12 | 14 | 10.25 mm |
What size wrench fits an M8 bolt?
Size Chart
| Bolt size | Size | Tolerance |
|---|---|---|
| 12mm | 12.30 | |
| 5/16″UNF | 1/2″ | 13.00 |
| M8 | 13mm | 13.30 |
| 1/4″BSW | 13.64 |
Is M6 or M8 bigger?
The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated “mm”)….Table 3.
| Metric | Closest Inch |
|---|---|
| M6-1.0 | 1/4-28 (Larger) |
| M7-1.0 | 1/4-28 (Smaller) |
| M8-1.25 | 5/16-18 (Smaller) |
| M10-1.5 | 3/8-16 (Smaller) |
What kind of screw is an M8 bolt?
An M8 Bolt or screw refers to the bolts diameter in Millimeters. It is a metric measurement. Example: M8 x 1.25 Hex Cap Screws Metric – A2 Stainless Steel. We sell M8 bolts on my website.
What’s the difference between M8 and 3 / 8 metric bolts?
M8 is code for 8 mm metric bolt you will still need to know the proper screw pitch to purchase the correct bolt. M8 is the metric equivalent to a 3/8 bolt. Be aware that they are similar but not the same.
What’s the difference between M6 and M8 bike bolts?
M8 bolts mean 8 x 1.25mm threading, and you can find other pitches being used in the 8mm diameter. It has an ISO dimension of M8 x 1.25mm. You can use 6mm Allen wrenches or 13mm hexagonal wrenches to screw or unscrew the bolts and nuts. M6 bolts are common on bikes, and they are used for various functions.
What does 8.8 mean on the head of a bolt?
The M8 will measure about 8 mm in diameter, more likely, just a touch undersize, (.31496″) The M10, about 10 mm in diameter, (.3937″) and the M12 about 12 mm in diameter, (.4724″). The “M” designates the bolt is Metric and the number after the M indicates the size.