Table of Contents
What size are metric bolts?
Metric clearance and tapping drill hole sizes. Size Clearance Hole mm Tapping Drill (std Pitch) M10 11 8.5 mm M12 14 10.25 mm M16 18 14 mm M20 22 17.5 mm.
How do I know if my bolts are metric or standard?
Telling the difference between a metric and imperial bolt is easy. If the bolt has lines on the head its standard or imperial. If the bolt has numbers on the head then its metric.
Is a 10.9 bolt metric or standard?
The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9.
Where are metric bolts used?
The bolts fasten aircraft and car parts exactly. Beyond these two important usage domains, the whole number measurement system is screwing its way into bicycle frames, into manufacturing equipment, and even making headway within the Americas, a region once dominated by the imperial measurement system.
What are the most common metric bolt sizes?
The most common were the 12mm and 10mm, followed by the 15, 17 and 19mm.
How do you identify metric threads?
Metric threads are measured by their pitch. That is the distance from the crest of one thread to the crest of the next measured in millimetres. The pitch of a metric thread can be checked by direct measurement with a metric rule. Imperial threads have their pitch measured indirectly as a given number of teeth per inch.
Which is better metric or SAE?
Metric Measurements Metric is the preferred fastener measurement throughout the world. More exact than fractions of an inch, metric measurements–based on millimeters–are a precise representation of the diameter of the head of the fastener. Imported cars have used metric bolts for more than 30 years.
Does America use grams?
While most of the world uses the international system of units, aka the metric system, the United States has its own system, based on the old British Imperial System of inches and pounds. This becomes relevant in the kitchen when dealing with international recipes that use grams and Celsius.
Is metric bigger or smaller than standard?
M 10 x 1.5 is a metric bolt with a 10 mm nominal diameter and 1.5 mm pitch. The standard American bolt is defined by the inch system designation. For standard bolts, the head size is measured in inches or fractions of an inch. For metric bolts, head size is measured in millimeters.
What does the 8.8 on a 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.
What does 9.8 mean on a bolt?
A metric bolt designated as ISO class 6.8 roughly corresponds in strength to an SAE Grade 2 bolt. Bolts of ISO class 8.8 and the slightly stronger class 9.8 roughly correspond to an SAE Grade 5 bolt. An ISO Class 10.9 bolt roughly corresponds to an SAE Grade 8 bolt.
How strong is a metric 8.8 bolt?
Metric steel bolts, screws and studs – proof and tensile strength Property Class Size Range (mm) Minimum Tensile Strength (10 6 Pa) 5.8 M5 – M24 520 8.8 M1.6 – M36 830 9.8 M1.6 – M16 900 10.9 M5 – M36 1040.
Is metric and SAE the same?
Metric and SAE wrenches have different systems of measurement. Metric sockets and wrenches use the metric measurement system. SAE wrenches use the imperial measurement system, mostly used in the United States, where it’s described using inches, or fractions of an inch. For this, you’d get a 1/3inch wrench or socket.
What is the difference between metric and imperial bolts?
These two fasteners even look and feel the same. The only key difference, however, is their units of measurement. Metric fasteners are measured using the metric units, whereas the imperial fasteners use imperial units of measurement.
Is mm metric or standard?
The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one thousandth of a metre, which is the SI base unit of length. Therefore, there are one thousand millimetres in a metre. There are ten millimetres in a centimetre.
What are the most commonly used metric sockets?
Mostly your basic sizes to take off and put back on body parts and accessories. 10 MM socket. Most of the time I use this size for most fender bolts, license plates. 8 MM Socket. I find these on fender’s mostly, and bracket bolts. 13 MM Socket. 7 MM Socket. 15 MM Socket. 1/4 in. 1/2 in. 6.5 MM Socket.
What does M12 mean on a bolt?
M12x1. 75 is the measurement code that indicates the thread size and thread pitch of a screw. The first half (M12), is the size measurement (metric) taken across the outside diameter of the thread (which in this case is 12mm).
Will a 8mm bolt fit a 5 16?
Can I use a M8 bolt on a 5/16 thread? They look pretty similar at glance Well, quick answer is no. They are not the same and they are not interchangeable, although they can work under certain circumstances.
Are metric threads tapered?
Parallel Threads. Next, determine if the thread is tapered or parallel. NPT/NPTF, BSPT, and Metric Tapered are examples of tapered threads. These threads create a seal through metal-to-metal wedging or slight deformation of the threads.
Are metric and imperial bolts interchangeable?
The thread profiles and pitches are different, so as a general rule one metric bolt can not be used as a replacement for an imperial bolt. For example, a 6-32 bolt has a thread pitch of about 0.79 mm/thd, and a body diameter of 3.5mm. These dimensions are not equivalent to any standard metric fasteners.
How do I know my thread type?
Determine if the thread is straight (parallel) or tapered. The thread is tapered if the diameter increases or decreases. Measure the thread diameter. Determine the number of threads per inch (TPI) or the pitch (metric threads) with the thread gauge. Determine the thread standard.
