Metric bolts are typically identified by their diameter, thread pitch, and length. The diameter is measured in millimeters, and is usually referred to as the “nominal diameter”. The thread pitch is the distance between each thread on the bolt, and is typically given in millimeters.
The length of the bolt is also specified in millimeters. It’s important to identify all three of these characteristics when locating a metric bolt, because they all affect the size and type of the bolt.
Metric bolts can also be identified by their grade or strength rating. Most metric bolts are manufactured using alloy steel or stainless steel and head markings may given information about the grade or strength of the bolt.
What does M8 1.25 mean?
M8 1.25 refers to a metric size bolt and is commonly used in the automotive and industrial fastener industries. It indicates that the diameter of the bolt is 8mm with a thread pitch (or distance between threads) of 1.25mm.
In other words, the distance between each thread of the bolt is 1.25mm. You often see these types of bolts in suspension and drive train applications, as well as on engines.
What does M10 mean in bolt size?
M10 is a metric bolt designation that denotes the size of a bolt, with the capital letter ‘M’ indicating that it is a metric bolt, followed by the numerical value ‘10’ which refers to the diameter of the bolt in millimeters.
As the M10 metric bolt has a 10 millimeter diameter, it also has a thread pitch of 1.5 millimeters. This is because the standard thread pitch for a M10 bolt is equal to its diameter divided by 6, which in this case is 1.
5 millimeters. Therefore M10 bolts have a diameter of 10 millimeters and a thread pitch of 1.5 millimeters.
Is M8 and 8mm the same?
No, M8 and 8mm are not the same. M8 is a metric screw designation, specifically for metric threads with a major diameter of 8mm, whereas 8mm is a measurement for the metric thread diameter. The M8 designation is composed of three parts: the ‘M’ which stands for ‘metric’, the ‘8’ which is the major diameter of the thread in mm, and the ‘0’ which is the pitch (the distance between two threads).
Additionally, 8mm also refers to the diameter of a drill bit, which has nothing to do with the same thread designation. Therefore, M8 and 8mm are not the same.
Is M12 bigger than M10?
No, M10 is actually a larger metric fastener than M12. M10 is roughly equal to 3/8 of an inch in diameter, while M12 is 1/4 of an inch in diameter. M10 is considered a larger fastener due to its wider diameter and stronger grip, which allows it to hold more weight and provide a better hold.
M12 is usually used in lighter applications and smaller sizes of fasteners due to its small diameter and weaker grip.
Is an M10 bolt 10mm wide?
No, an M10 bolt is not 10mm wide. M10 bolts typically have a shank diameter of 10mm, meaning the diameter on the threaded part of the bolt, but their widths can vary depending on their length and thread pitch.
For example, a 20mm long M10 bolt with a 1.5mm thread pitch would be 11mm wide, while the same length bolt with a 2mm thread pitch would be 12mm wide.
What is M10 thread size?
M10 thread size is a metric standard thread size. It has an outside diameter (OD) of 10mm and a pitch of 1.5mm, which means that there are 1.5mm of spacing between each thread. It is commonly used in construction or industrial applications, and is suitable for metal, plastic, or wood.
It is also used in some plumbing applications. The thread length, or length of engagement, is typically 25mm, but this can vary depending on the application. The thread is usually identified with an “M10” label, which indicates the metric standard and the size of the thread.
What size is a 10mm bolt?
A 10mm bolt is commonly referred to as a Metric Coarse (M. C. ) bolt and is generally used in heavy duty applications. It is important to note that the thread count of a 10mm bolt can vary depending on the application, but they generally have a thread count of 1.25mm-1.
5mm. Additionally, a 10mm bolt usually has a head diameter of 17mm and a length of between 16-60mm. The threading on the length of the bolt also varies from coarse threading to fine threading, coarse being the most common.
Additionally, 10mm bolts come in various materials and finishes such as stainless steel, brass, and zinc plated to fit your specific requirements.
Is Grade 8 or 12.9 stronger?
From a mechanical engineering perspective, Grade 8 or 12.9 are both hardened steel fasteners, but the strength of each grade will depend on the application. Grade 8 is stronger than the commercially available Grade 5, making it an ideal choice for highly stressed applications.
However, Grade 12.9 fasteners are made from alloy steel, so their strength and hardness levels far exceed Grade 8. While Grade 12.9 may cost more initially, their premium strength makes them the preferred choice for certain high-stress applications.
In general, Grade 12.9 is the preferred choice for strength and resilience, though both have their own purposes.
What are Grade 9 bolts used for?
Grade 9 bolts are high-strength bolts used in industrial and automotive applications. They are made from alloy steel and have an ultimate tensile strength of 150,000 PSI. These bolts are ideal for heavy duty structural bolting applications such as structural steel joints in bridges, buildings and other large construction projects.
They are also commonly used to secure body panels in automotive parts and provide a secure connection between two pieces of material. Grade 9 bolts are more expensive than standard bolts because they are made from hardier, higher grade alloy steel than the average bolt and provide greater strength and durability.
Is there a grade 10 bolt?
Yes, grade 10 bolts are available. A grade 10 bolt is a type of high-strength bolt made of low-carbon alloy steel and quenched and tempered to achieve a desired mechanical property, such as tensile strength.
Grade 10 bolts are typically used in load-bearing applications that require a high degree of tensile strength and durability. Common applications include vehicle and machinery frames, overhead garage door rollers, and earth-moving and construction equipment.
Grade 10 bolts are identified by a yellow-zinc chromate finish and are tested to meet ASTM A490 specifications.
Are Grade 8 bolts or Grade 5 shear easier?
It depends on the particular application. Generally, Grade 8 bolts are made of alloy steel and are heat-treated, making them much stronger than Grade 5 bolts. They are a better choice for applications that require high strength, corrosion resistance, and shock resistance.
Meanwhile, Grade 5 bolts are made of medium carbon steel and are quenched and tempered, resulting in slightly lower strength than Grade 8 bolts. They are a better choice for applications that don’t have exacting strength requirements, such as in non-critical automotive applications.
In terms of shear, Grade 5 is typically easier to shear. Grade 8 bolts may be more difficult depending on the alloy composition, as the shear strength is affected by the material hardness, the hardness of the cut surfaces, the temperature at the contact zone, and the frictional characteristics between the two surfaces.
Overall, Grade 5 bolts are easier to shear than Grade 8 bolts, but the exact relative difficulty depends on the particular application.
Are Grade 8 bolts stronger than stainless steel bolts?
It depends on the type of stainless steel bolt being used. Grade 8 bolts are made of medium carbon alloy steel, and can be extremely strong with a tensile strength of at least 150,000 psi, but that strength can vary based on the diameter of the bolt.
On the other hand, stainless steel bolts are made of an alloy of iron, chromium, and other metals, and can also be extremely strong, though the strength will vary depending on the grade and composition of the stainless steel.
Grade 8 bolts may be stronger than stainless steel bolts in some cases, depending on the grade of stainless steel being used and the diameter and material of the grade 8 bolt. It’s not possible to give an exact answer without knowing more about the specific bolts being compared.
How do you read metric bolt sizes?
Reading metric bolt sizes can be done easily, once you understand the basic principles. The most common metric bolt size is expressed as a number in millimeters followed by the letter “M”. For example, a 6mm bolt would be expressed as “M6.
” Looking at the bolt head, you will see small numbers and notations on the sides that indicate the bolt size. You may see a “D”, which refers to the bolt’s outer diameter, followed by a number. For example, a “D8” means that the bolt’s outer diameter is 8mm.
A “T” followed by a number will tell you the length of the thread. For example, “T25” means that there are 25 threads per inch. The letter “P” preceded by a number will tell you the pitch of the thread.
For example, “P1.25” means that the thread is 1.25mm. Finally, some metric bolts come with a “C” followed by a number, which indicates the head diameter of the bolt. For example, a “C10” indicates that the head diameter is 10mm.
Once you understand all these notations, you can read metric bolt sizes with ease.
What is the difference between 8.8 and 10.9 bolts?
The main difference between 8.8 and 10.9 bolts is the material that they are made of and the strength of the bolts. 8.8 bolts are made of medium carbon steel and are quenched and tempered to provide a tensile strength of 800 MPa, whereas 10.
9 bolts are made of alloy steel and are quenched and tempered to provide a tensile strength of 1000 MPa. As a result, 10.9 bolts are about 20% stronger and are a better choice for applications requiring higher tensile strength, such as automotive or motorcycle applications.8.
8 bolts, however, are typically less expensive and are better suited for indoor or non-structural applications. Both bolts come in a variety of different sizes and offer a variety of configurations, such as hex head bolts, socket cap screws, and countersunk screws.