Bolt Sizes Chart

M10-1.0 x 20 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 size is a M8 bolt?

The defined diameter of metric bolts is actually slightly larger than the actual diameter of the bolt shaft. 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.

How do I determine the size of a bolt?

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.

What do bolt size numbers mean?

The size of a metric bolt is specified using pitch, diameter, and length in millimeters. For example, in M8-1.0*20, the “M” means the Metric thread designation, the digit 8 refers to the Nominal diameter (in millimeters), 1.0 refers to the pitch, and 20 refers to the length.

What does 8.8 mean on a bolt?

So, in English, a Property Class 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of that nominal tensile strength, so 640 MPa.

Is M10 bigger than M8?

10mm is larger than 8mm. The second number is the thread pitch. The nut and the bolt need the same pitch.

Is M6 bigger than M8?

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)

Is M10 and 3/8 the same?

That said, they are very close, the 3/8" bolt is about 0.019" smaller and the pitch's are very close so the 3/8 -16 bolt will thread in the 10mm x 1.5 but the 10 x 1.5 bolt will not fit the 3/8 but..

What size nut goes on a 3/4 bolt?

Size	Diameter*
	Hex Nut	Machine Screw Nut
5/8"	15/16"	-
3/4"	1-1/8"	-
7/8"	1-5/16"	-

How are m10 bolts measured?

Fastener length is measured from where the material surface is assumed to be, to the end of the fastener. For fasteners where the head usually sits above the surface, the measurement is from directly under the head to the end of the fastener.

What is nominal bolt diameter?

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.

Does M12 mean 12mm?

A: 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 does M8 mean?

m8 (plural m8s or m8's) (Internet slang, text messaging) Abbreviation of mate.

What does M6 mean on a bolt?

M6 refers to a metric 6 mm screw. The outside diameter of the threads is 6 mm. The standard metric rack screw is actually an M6 x 1 mm. The number 1 mm refers to 1 threads per millimeter. You can identify an M6 screw by measuring the diameter at slightly more than 7/32″ (0.2362″).

Which is stronger 8.8 or Grade 5?

Grade/Class	Strength
Grade 5	Medium strength.
Grade 8	High strength.
Metric Class 4	Similar to Grade 2.
Metric Class 8.8	Similar to Grade 5.

Is Grade 8 or 12.9 stronger?

Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

Is a 8.8 bolt the same as Grade 8 bolt?

Q: I'm specifying the strength of a metric fastener and need your help. Is Class 8.8 the same as Grade 8? A: The answer is no. Class 8.8 is not the same as Grade 8.

What does M5 mean?

Bolts and nuts described as M5 means they are bolts or nuts with threaded 5 mm bodies. Additional numbers in the description indicate thread pitch and length. The M series metric fasteners have standardized pitches and diameters and head wrench sizes.

What is M10 in mm?

Size	Spanner	Allen Key
M8	13 mm	6 mm
M10	17 mm	8 mm
M12	19 mm	10 mm
M16	24 mm	14 mm

What does 10.9 mean on a bolt?

Class 10.9 Alloy steel, quenched and tempered.