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 thread M8 mean?
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.
What do the numbers on bolts mean?
Bolt Grade Markings Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt. For most home and automotive applications, you won't need anything more than a grade 8 bolt strength or metric class 10.9.
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.
What does #8 bolt mean?
Their size is described as diameter, number of threads per inch (if used with a nut or in a threaded hole), and length in inches. In all cases, the larger the number, the larger the size. Consequently a #8 screw is larger than a #4 screw, just as a 3 inch bolt is larger than a 2 inch bolt.
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.
How do you read bolt markings?
https://www.youtube.com/watch?v=e3AU-a2Jm8U
How do you read a M bolt size?
https://www.youtube.com/watch?v=78R1QXL9ijM
What do bolt sizes 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 a 3/8 bolt mean?
3/8" is the diameter of the bolt shank the non threaded part that the threads are cut into. Then in 3/8" the coarse thread is 16 threads per inch and for fine thread it is 24 threads per inch. You can easily measure these with a ruler and figure it out
What does 8.8 bolt mean?
A property class (PC) is the metric equivalent of a grade in inch series terminology. So, in English, a PC 8.8 bolt is a bolt with a nominal tensile strength of 800 MPa and a nominal yield strength that is 80% of the bolt's nominal tensile strength, or 640 MPa.Dec 8, 2021
How do you read a bolt code?
- Read the first letter of the size. This the largest diameter: the measurement of the screw on the thread.
- Read the second number. This is either the number of threads per unit of the distance between threads; also known as the "thread pitch".
- Read the third number, generally the one following the "x."
How wide is M8 thread?
Tap size Basic major dia (mm) Basic major dia (inch)
--------- -------------------- ----------------------
M5 x 0.8 5mm .1969
M6 x 1 6mm .2362
M8 x 1.25 8mm .3150
M8 x 1 8mm .3150
The “M” size of an ISO metric thread represents the screw's nominal size in millimetres. For example, an M3 screw will have a 3mm nominal thread diameter - in reality, the screw would be slightly undersized to ensure compatibility with an M3 (3mm) nut (which, in turn, would also be slightly oversized).
How do I know what kind of bolt I have?
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.
What bolt size is M8?
Size Clearance Hole mm Tapping Drill (std Pitch)
---- ----------------- -------------------------
M5 5.5 4.2 mm
M6 6.5 5.0 mm
M8 9 6.75 mm
M10 11 8.5 mm
What does M stand for in M4 screw?
The "M" designation for metric screws indicates the nominal outer diameter of the screw thread, in millimetres. This is also referred to as the "major" diameter in the information below.
What does M mean on bolts?
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.
This is because 0.060 + (4 x 0.013) = 0.112. Screws larger than 10 are listed as fractions of an inch. For example: 1/8-10 x 4/6 has a major diameter of 1/8th of an inch. Metric threads use "M" to denote the measurement in millimeters. 4 x 15 has a major diameter of 5 millimeters.