# How do you read metric bolt sizes?

Determine the length of the metric bolt by looking at the third number. For example, if the metric bolt was M14x1. 5×25, it would have a length of 25 millimeters. Look on the bolt head for the number denoting the strength of the bolt.

In addition, most metric bolts are identified by a number stamped on the bolt head, such as 4.6, 5.8 or 10.9. The number has nothing to do with the size, but does indicate the relative strength of the bolt. The higher the number, the stronger the bolt.

Subsequently, question is, 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, 14â€”the larger the number, the larger the screw.

Just so, what are standard metric bolt sizes?

Inch & Metric Thread Standards. Metric thread sizes are specified differently than inch thread sizes. For example, a 3/8-16 (coarse) thread has a 3/8″ nominal major diameter and 16 threads per inch, while a 3/8-24 (fine) thread has the same nominal major diameter and 24 threads per inch.

What does m12x1 25 mean?

M12x1. 75 is the metric way of stating a screw thread. The M12 means the thread OD is 12mm, the 1.75 is the pitch of the thread. One turn of the screw moves the screw’s position 1.75mm.

### What does m10 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 5/16 The same as m8?

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.

### What is the strongest bolt grade?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes; its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi.

### What do bolt size numbers mean?

The number 1 or number larger than one, or number one or number larger than one followed by a fraction, is the diameter of the shaft. The number following the hyphen is the number of threads per inch; that is, the number of threads on the shaft itself, per inch of shaft length.

### 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 is a #10 screw?

US Machine Screw Diameters Size Thread Diameter Decimal Nearest Fractional #10 0.19″ 3/16″ #12 0.21″ 7/32″ #14 0.24″ 1/4″

### 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 is m12?

Measure them. 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, (.

### 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 are the most common metric bolt sizes?

Re: Most common metric bolt sizes Used to be (back in the 70’s and 80’s) that European manufacturers used the 13mm and 10mm fasteners the most; followed by the 14, 17, and 19mm. The Asian manufacturers used the 12mm and 10mm as the most common, followed by the 15, 17 and 19mm.

### How are nut sizes measured?

Place the end of a measuring tape on one of the flat sides of the nut’s outer perimeter. Stretch the tape measure across the nut’s diameter to the flat-side directly across from the one your pulling from. If the nut is metric, count the number of lines on the tape measure to find the measurement.

### What size is m8 in inches?

Tap size Basic major dia (mm) Basic major dia (inch) M6 x 1 6mm .2362 M8 x 1.25 8mm .3150 M8 x 1 8mm .3150 M10 x 1.5 10mm .3937

### What does the 8.8 mean on a metric 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.