# What are m8 bolts?

M8 is the designation for a metric (M) sized bolt or screw that is 8mm (8) in diameter. This is roughly equivalent to a 5/16 bolt or screw.

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″).

One may also ask, how strong is an m8 bolt? From the table at right, for a strength class of 10.9 and a maximum allowable load of 200 kgf, the suitable bolt is a 318[kgf]M8.

In this way, what is an m8 nut?

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. There is an exception though—if pitch isn’t specified, the fastener is coarse threaded. Consider this size… M8-1.0 x 20.

What does m8 1.25 mean?

For metric fasteners, you will see a M8 x 1.25 or an M8 x 1. For thread pitch, the distance between two points is the second number meaning the higher the number the fewer threads there are. This means the M8 x 1.25 is the coarse threading and the M8 x 1 is the fine thread.

### Is m8 the same as #8?

The answer to your question is that M8 refers to a metric 8mm diameter machine screw/hexagon headed fully threaded set screw. And #8 x 3″ screw refers to an imperial no 8 gauge diameter (about 4.2mm in metric) wood or self tapping screw which is 3 inches long.

### What size drill bit to use for a m8?

Tap Size Tap Size Drill Size M7 x 1 6.1mm M8 x 1 7.1mm M8 x 1.25 6.7mm M9 x 0.75 8.3mm

### What is m8 thread size?

Tap size Basic major dia (mm) Basic major dia (inch) M8 x 1 8mm .3150 M10 x 1.5 10mm .3937 M10 x 1.25 10mm .3937 M12 x 1.75 12mm .4724

### What size hole do you drill for a m8 bolt?

Metric Threads Thread Drill size for tapping standard metric threads Clearance hole M4 3.3 4.5 M5 4.2 5.5 M6 5 6.6 M8 6.8 9

### Is m8 bigger than 5 16?

8 mm and 5/16″ is so close in dimension, would the maker bother to make one a hair larger in size (or one a hair smaller)? The 5/16″ will be sloppier. it is equivalent to 8.255 mm. The 5/16″ will be sloppier.

### Is 10mm the same as 3 8?

It’s the same size. 3/8 is in inch and and its 10mm.

### What does m10x1 5 mean?

Inch & Metric Thread Standards Metric thread callouts are fundamentally different because the thread pitch (distance between each thread, in mm) is specified instead of threads per inch or per mm. For example, an M10x1. 5 (coarse) thread has a 1.5mm pitch, while an M10x1. 25 (fine) thread has a 1.25mm pitch.

### What does m5 mean?

The “M” means “metric.” Metric threads are designated by diameter and thread spacing. For instance, the most common bolt size used on bicycles is 5 x . 8, also known as “M5.” This size is used for water bottle mounts, cable anchor bolts, fender/rack eyelets, shifter mounts etc. The “5” means the bolt diameter is 5 mm.

### What is M in bolt size?

The “M” designation for metric screws indicates the nominal outer diameter of the screw, in millimetres (e.g., an M6 screw has a nominal outer diameter of 6 millimetres).

### What size nut do I need?

If the nut is US standard, count the smallest lines on the tape measure in sixteenths. Add the sixteenths together to find the size. If you count 11 lines, the size of the nut is 11/16. You can also measure from point-to-point to find the “Whitworth system” measurement.

### What does 8.8 mean on a bolt?

If you have ever looked a metric hex bolt you might notice the markings 8.8, 10.9 or 12.9 this does not mean grade 8,10 or 12. The grade 8.8 refers to the tensile strength which is generally 116,000 psi, grade 10.9 is generally 150,000 and grade 12.9 is generally 175,000 psi.

### What does m10 nut mean?

M10 means a 10 millimeter outer diameter for the bolt or whatever piece it is; M12 means 12 millimeters. The part after the ‘x’ is the pitch — how many mm a thread is wide. To figure out which you have, you can measure the existing part with calipers and a thread gauge.

### Is m12 the same as 12mm?

Yes. M12 is a 12mm diameter thread. You have to be sure the thread pitch measured in threads per millimeter (1.5 here) is the same as what u need.

### What size nut goes on a 12mm bolt?

Coarse Thread Bolts NOM. DIA. PITCH mm NUT Size M12 1.75 19 M14 2 22 M16 2 24 M18 2.5 27