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.

How do you measure bolt nut size?

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 an M12 bolt 12mm?

M12 bolts are a metric sized bolt with a 12mm thread diameter.

How are hex nuts size?

Hex nut size refers to its nominal thread diameter. Typically, sizes range from 1/4" to about 2 1/2". Size is specified in inches, usually fractional rather than decimal. ... Width across flats, which is wrench size, ranges from 1.50 to 1.75 times the nominal hex nut size and thickness is 0.850 to 0.875 times the size.

How do you measure a hex nut?

Bolts are measured in length of shank, bolt head size, width of shank (the diameter of the threaded bolt body) and the thread pitch (the size of the thread). Nuts are measured by the width of the hex shape and by their thread pitch.

Bolt and nut measurement

34 related questions found

What is the nominal size of a nut?

NOMINAL DIAMETER (NOMINAL BOLT DIAMETER)

The diameter equal to the external diameter of the threads or the overall diameter of the part. (Nominal diameter is more of a label than a size. For example, a bolt and nut may be described as being ½” diameter.

How do I know if my nut is metric or standard?

How long is that bolt? Most bolts come in pretty uniform lengths; and this is a good way to determine if the bolt is metric or standard. Measure the bolt length (not including the cap), and see if it's closer to a fraction of an inch, or a nice and round millimeter length that ends in 5 or 0.

Is M10 a 10mm?

If the size is M10 x 25, that would mean that the diameter is 10 mm. ... 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.

Whats bigger 3/8 or 10mm?

10mm = just over 3/8 inch. 11mm = almost 7/16 inch. 12mm = almost 15/32 inch (= almost 1/2 inch) ... 18mm = just over 11/16 inch.

What is bigger 5/16 or M8?

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!