# What is M in M12?

## What is M in M12?

Metric nuts and bolts are commonly referenced using ‘M’ sizes, for example: M3, M8, M12. But the size of a metric fastener is more accurately specified using diameter, pitch and length dimensions, in millimeters. The letter ‘M’ indicates that this bolt uses a metric thread. …

What does M mean on a bolt head?

Fortunately, metric bolts are marked differently than SAE bolts. An ISO metric bolt larger than 6 mm in diameter has either “ISO M” or “M” embossed on top of the head. 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.

What size is an M 12 bolt?

M12-1.75 x 60 mm Class 10.9 Metric Zinc Plated Steel Hex Head Cap Screws (10-Pack)

### How are M bolts measured?

Do not measure the head of the bolt, measure the threaded part, outside of the threads. If your bolt is metric, then the diameter is stated using the letter “M”. For example, if your bolt has a diameter of 4mm then it is called an ‘M4 bolt’ if your bolt is imperial then it will be measured in inches.

What does M stand for in bolt sizes?

Taking a closer look at this description, let’s explore its meaning: M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener’s length, in millimeters.

What does M2 screw mean?

M2 screws are typically used in the manufacture of small items of electrical equipment, laptops, cameras and mobile phones. The “M” designation for metric screws indicates the outer diameter of the screw in millimetres, so for an M2 screw, the outer diameter is 2mm.

## What does M mean in threads?

M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters.

What does the M mean in screw size?

The standard metric rack screw is called M6 x 1. The ‘M’ means it’s metric. The ‘6’ is the outside diameter measured in millimeters, and the ‘1’ is the distance between adjacent threads, also in millimeters. Metric threads are used outside of the USA, and commonly in products by HP and other global entities.

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 M16 in inches?

Tap size Basic major dia (mm) Basic major dia (inch)
M14 x 1.5 14mm .5512
M16 x 2 16mm .6299
M16 x 1.5 16mm .6299
M18 x 2.5 18mm .7087

What size is M3 thread?

ISO Metric Machine Screw Thread Dimensions

Thread Size Nominal Diameter (mm) Thread Pitch (mm)
M3 3.0 0.50
M3.5 3.5 0.60
M4 4.0 0.70
M4.5 4.5 0.75

How do you measure M8 and M12 bolts?

, Stops to think and nothing happens. 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, (.4724″).

## What does the “m” stand for on a screw?

The “M” stands for “metric” and the number represents the nominal diameter of the fastener such as 6mm, 8mm, 12mm, etc. Typically you’ll see screw size designations such as M8x1.0 whereby the “1.0” represents the thread pitch 0r the distance between the lands or grooves of two threads. Until you learn what…

What does the m mean in size on nuts and bolts?

The M here refers to the metric system. So sizes are in metric, as opposed to the standard system (aka the US system). All nuts and bolts come in sizes that are expressed either in the metric or the standard system.

What is the difference between M10 and M8 bolts?

In American standard they often come in course and fine. In metric its usually just categorized like M8, M10, etc. So if your nut is an M10 thread, you need an M10 bolt sufficient in length to accomplish fastening your pieces together. However, it is possible to machine different, proprietary, threads per inch.