What are the common metric bolt sizes?
- Diameter: the larger the number, the larger the fastener
- Pitch: the larger the number, the more coarse the thread (the fewer the threads per unit of measure); coarse is the most common metric thread and is assumed when pitch ...
- Length: the larger the number, the longer the fastener
How to identify a metric bolt?
- Identify if the thread is parallel or tapered
- Determine the thread pitch in mm using a thread gauge or calipers (typically 1.0, 1.5, or 2.0, but other sizes do exist)
- Determine the thread O.D (male thread) or I.D (female thread) using calipers.
What size bolts standard or metric?
When getting the length using inches, here are some points to keep in mind:
- Take the length of a flat head from the tip to the top of the head.
- For round-headed ones that are not countersunk, measure from the flat underside to the tip.
- For round-headed ones that are countersunk, start measuring where the countersunk and the oval top meet in the middle. ...
What is the length of a metric bolt?
The M denotes that you are measuring in mm of the Metric system. The first number, the 5, denotes the diameter, the 1.0 is the distance between the threads, and the 35 is the length of the bolt when measured without the head.
What are the sizes of metric bolts?
Metric clearance and tapping drill hole sizes.SizeClearance Hole mmTapping Drill (std Pitch)M55.54.2 mmM66.55.0 mmM896.75 mmM10118.5 mm5 more rows•Jun 19, 2020
Is a M10 bolt a 10mm?
If the size is M10 x 25, that would mean that the diameter is 10 mm. Since there is no thread pitch listed, the fastener is assumed to have a coarse thread. 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.
What size are M10 bolts?
SizeClearance HoleTapping Drill (fine pitch)M66.55.25 mmM897 mmM10119.0 or 8.75 mmM121410.5 mm5 more rows
What size is M8 in inches?
Tap sizeBasic major dia (mm)Basic major dia (inch)M4 x 0.74mm.1575M5 x 0.85mm.1969M6 x 16mm.2362M8 x 1.258mm.315024 more rows
What M size is 10mm?
M6Metric Spanner SizesNominal SizeSpanner SizeM610mmM711mmM813mmM1017mm14 more rows
What does M12 mean on a bolt?
The first half (M12), is the size measurement (metric) taken across the outside diameter of the thread (which in this case is 12mm). The second half is the thread pitch, which is the measurement of threads/inch (which in this case is 1.75).
What size is M12 nut in mm?
M12 (12mm) Thread Size. +0/-0.33mm Nut Width A/F (F) Tolerance.
What is meaning of M10 bolt?
The "M" designates the bolt is Metric and the number after the M indicates the size. The number after that is the length. The number after that is the thread pitch. eg: M10 x 40 x 1.25. In this example the bolt is 10 mm in diameter, 40 mm long, and the threads are 1.25 mm apart.
How metric bolts are measured?
Metric fasteners are specified with a thread pitch instead of a thread count. The thread pitch is the distance between threads expressed in millimetres (measured along the length of the fastener). For example a thread pitch of 1.5 means that the distance between one thread and the next is 1.5mm.
Which is bigger M8 or M6?
The size of a metric screw or bolt is specified as diameter, pitch and length, in millimeters (millimeters is abbreviated "mm"). For nuts, size will appear as diameter and pitch....Table 3.MetricClosest InchM6-1.01/4-28 (Larger)M7-1.01/4-28 (Smaller)M8-1.255/16-18 (Smaller)M10-1.53/8-16 (Smaller)16 more rows
What size is a 8.8 bolt?
The diameter of the 8.8 Jh Bolt range from 20mm to 100mm. They can come with different finishes as well. The zinc plated, hot dip galvanized and plain finishes are available for different application needs. The 8.8 Metric Bolt is one of the standards adopted.
How do you read bolt sizes?
0:212:23How to Measure Screws & Bolts - US & Metric Sizing | Fasteners 101YouTubeStart of suggested clipEnd of suggested clipSo when you read a bolt that says quarter 20 by 2 that means quarter inch diameter 20 TPI that'sMoreSo when you read a bolt that says quarter 20 by 2 that means quarter inch diameter 20 TPI that's threads per inch which would be here.
What is pitch in bolts?
But it is easier to specify the components by a single size designation since the bolt and nut are mating components.) Pitch is the distance from the crest of one thread to the next or the distance from one thread groove to the next, measured from crest to crest. Pitch is also described as the number of threads per inch.
What is nominal 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.
What is the metric bolt size?
Metric bolts are referenced using “M” sizes, such as the M8 bolt size. 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. Sometimes, the pitch is omitted in the abbreviated format, such as M8-20, this means the bolt has a coarse thread. The bolt dimension can also be expressed in imperial units.
What is a bolt?
Bolts are a type of essential fastener that often assembled with nuts. Using a bolt with the right sizes is vital for jobs in various machinery and equipment. In this article, we’ll go through a complete guide of bolts, which involves bolts definition, types, dimensions explain, and the standard bolt sizes chart in metric and imperial.
Why are hex bolts used?
Hex bolts can be used for infrastructure that requires a strong fastener with high tensile strength properties, they can also be used in tight spaces with limited access because tools can access them from all angles, or fastening wood, steel, or other materials in bridges, buildings, and more construction projects.
What are hexagonal bolts made of?
Steel is one of the most common materials of bolts, but hex bolts may also be made with aluminum, copper, brass, titanium, or even plastic.
What is an anchor bolt?
Anchor bolt. With a threaded part in one end and non-threaded in another end, which can be made in L shape, Pin type, Wedge type, or other forms, often work with steel plates or stiffeners to connect structural and non-structural elements to the concrete, transfer tension forces and shear forces. Anchor bolts come in different types based on ...
What is the diameter of a M8 bolt?
The defined diameter of metric bolts is actually slightly larger than the actual diameter. So an M8 bolt would have a diameter that’s slightly under 8mm. 2.
What is an elevator bolt?
Elevator bolt. Similar to the carriage bolt but elevator bolt with a thin flat or countersunk head and a square undercut, used in conveyor system setups. The head diameter of elevator bolts is larger than other types, which can prevent the bolt from going through soft conveyor material.
How do you determine screw size?
When looking into and determining screw size, there are two things you need to understand – the length and the thread count. The latter is also commonly referred to as threads per inch (TPI) or thread pitch. We use the TPI to determine the thread’s fineness. The number will also tell if a screw can thread through a bolt.
How do I identify screw size?
Identifying sizes can be tricky if you don’t know how to read them. They are represented in an alphanumeric code, which is difficult to understand if you are not familiar with it. Codes such as “1/8-10 x 4/6”, “M5-0.4 x 15”, and “4-30 x 0.10” may seem overwhelming and meaningless at the same time, but it is the most vital information.
What do the numbers mean on screw sizes?
If you often do DIY, one of the popular items you are using is screws. It comes in several sizes, which you can find in the packaging. Finding the correct size can be a daunting task if you don’t know the imperial or metric system. A conversion table would be handy if you often convert between these two systems.
Metric System
The metric system was based on the meter, a system of measurement whose origin was in France in the 1970s. When taking the length of a screw, we use meters.
Standard System
The standard system, otherwise known as the imperial system, was introduced in the British Weights and Measures Act 1824. It evolved through a series of amendments in the said act. For some time, the imperial system had been the standard measurement system. However, by the late 20th century, several countries have adopted the metric system.
Buying Guide
Now that we have discussed some of the basics, it is time to guide you through what you need to know. Finding the right type and specifications will hold materials together nicely.
Types
Depending on the application, they come in different forms and sizes. Here are some of the most common ones.