How do I know what size nut I need for 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.
How do you figure out what size nut you need?
If the nut is metric, count the number of lines on the tape measure to find the measurement. If you count 9 lines, the size is a 9-mm (millimeter) nut. If the nut is US standard, count the smallest lines on the tape measure in sixteenths. Add the sixteenths together to find the size.
How do you match a bolt to a nut?
The nut should always be stronger than the bolt, so when using higher strength bolts, such as metric class 10.9, make sure to use the correct, corresponding nut. In this case, a class 10 nut would be correct. Stronger nuts may be used with lower strength bolts without any problems.
What size is M18 bolt?
Dimensions for DIN931 Hex Head Bolt
| Diameter (d) | Pitch | Across Flats (s) |
|---|---|---|
| M16 | 2mm | 24mm |
| M18 | 2.5mm | 27mm |
| M20 | 2.5mm | 30mm |
| M22 | 2.5mm | 32mm |
What does a 1/4 20 screw mean?
The fraction is the diameter of the shaft, in fraction of an inch. The number following the hyphen is the number of threads per inch, that is, the number of threads on the shaft itself, per inch of shaft length. 1/4-20: One quarter inch shaft diameter, 20 threads per inch.
How can you tell if a bolt is 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.
What does the 8.8 on a bolt mean?
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.
Do Nuts & bolts come in different sizes?
Introduction: Metric Nuts and Bolts
There are no fewer than 5 different threads for different applications and 10 different standard strength grades defined for each size of bolt. There are nineteen standard sizes – known as the ‘preferred ‘ sizes and ten less commonly used (the so-called ‘non-preferred’) sizes.
What is M in bolt size?
The letter ‘M’ indicates that this bolt uses a metric thread. The number ‘8’ refers to the nominal diameter of the bolt shaft in millimeters. The number 1.0 is the thread pitch of the bolt, which is the distance between threads, in millimeters. And the final figure, 20, is the length in millimeters.
What size is M8 nut?
8mm
M8 Hexagon Nuts (DIN 934) – Marine Stainless Steel (A4) Technical Specification
| Finish | Natural |
|---|---|
| Nut Width A/F (J) | 13mm |
| Nut Width A/P (P) | 14.95mm |
| Thread Pitch | 1.25mm |
| Thread Size | M8 (8mm) |
What size is M16 in inches?
Table 3.
| Metric | Closest Inch |
|---|---|
| M10-1.5 | 3/8-16 (Smaller) |
| M12-1.75 | 1/2-13 (Larger) |
| M14-2.0 | 9/16-12 (Larger) |
| M16-2.0 | 5/8-11 (Smaller) |
Is a #8 or 10 screw bigger?
Machine screws are often found in sizes of: 0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14—the larger the number, the larger the screw.
What does 8g mean in screws?
The #8 gauge screw has a major diameter of 0.17″ and 8 TPI. The screw is 1-1/4″ long, a measurement taken from the bottom of the head to the point.
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.
How do you tell the difference between metric and standard sockets?
SAE sockets are sized in inches and fractions of inches. Metric and SAE wrenches have different systems of measurement. Metric sockets and wrenches use the metric measurement system. This is when millimeters are used to describe the size.
What’s the difference between 4.6 and 8.8 bolts?
Category 4.6/S refers to commercial bolts of Property Class 4.6 conforming to AS 1111.1 tightened using a standard wrench to a ‘snug-tight’ condition. Category 8.8/S refers to any bolt of Property Class 8.8, tightened using a standard wrench to a ‘snug- tight’ condition in the same way as for category 4.6/S.
What size is a 9.8 bolt?
Metric steel bolts, screws and studs – proof and tensile strength.
| Property Class | Size Range (mm) | Minimum Tensile Strength (106 Pa) |
|---|---|---|
| 4.8 | M1.6 – M16 | 420 |
| 5.8 | M5 – M24 | 520 |
| 8.8 | M1.6 – M36 | 830 |
| 9.8 | M1.6 – M16 | 900 |
What does 3 lines on a bolt mean?
The markings can identify the standard to which the bolt was made. For instance, if a bolt head contains three radial lines, then it’s a Grade 5 bolt.
What sizes do bolts come in?
US Standard Thread Length for Bolts
| Bolt Diameter | Standard Thread Length (in.) * | |
|---|---|---|
| Bolts 6 inches and shorter | Bolts longer than 6 inches | |
| 5/8″ | 1-1/2″ | 1-3/4″ |
| 3/4″ | 1-3/4″ | 2″ |
| 7/8″ | 2″ | 2-1/4″ |
What size nut fits a 1/2 bolt?
US Nut Size Table
| Size | Diameter* | |
|---|---|---|
| Hex Nut | Machine Screw Nut | |
| 1/2″ | 3/4″ | – |
| 9/16″ | 7/8″ | – |
| 5/8″ | 15/16″ | – |
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