A spanner is a type of wrench that is used to turn nuts and bolts. There are many different sizes and types of spanners, and the size you need will depend on the size of the bolt you are trying to turn. To calculate the spanner size you need for a particular bolt, you will first need to know the bolt’s diameter. Once you have the diameter, you can consult a spanner size chart to find the right size spanner for the job.

**Summary**Close

To calculate spanner size for a bolt, first measure the bolt’s diameter with a ruler or caliper. Then, use a spanner size chart to find the corresponding spanner size for that diameter.

## How do I know what size spanner my bolt is?

A spanner is a tool used to tighten or loosen bolts and nuts. The size of the spanner is indicated by the width across the flats, which is imprinted in millimeters (mm) on the spanner. Older British and current US spanners have inch sizes that are imprinted in intermediate sizes in fractions.

Most modern spanner sizes refer to the distance across the flats of the hexagonal nut or bolt they would fit. For example, a 17mm spanner would fit a nut 17mm across its flats. This is usually a nut to fit a 10mm diameter bolt (M10).

### What spanner size is M8

A metric spanner is a tool used to apply torque to nuts and bolts. The size of the spanner is determined by the distance between the jaws, and is typically measured in millimeters. The most common sizes are M6, M7, M8, and M10.

What is the size of a 15mm wrench?

Metric Wrench Conversion ChartTool SizeInchMetric3/8″9/16″14mm7/16″5/8″16mm1/2″3/4″19mm9/16″13/16″21mm39 more rows

What is the size of a 10mm wrench?

Standard / Metric Wrench Conversion ChartBolt DiameterStandardMetric3/8″9/16″14mm7/16″5/8″16mm1/2″3/4″19mm9/16″13/16″21mm39 more rows

What is the size of an 8mm wrench?

Metric Wrench Conversion ChartTool SizeInchMetric3/8″9/16″14mm7/16″5/8″16mm1/2″3/4″19mm9/16″13/16″21mm39 more rows

What is the size of a 24mm wrench?

Metric Wrench Conversion ChartTool SizeInchMetric3/8″9/16″14mm7/16″5/8

## What size wrench fits what size bolt?

The size of a US bolt head and wrench is determined by the bolt diameter. For example, a hex bolt with a 1″ diameter would require a 1-1/2″ wrench, while a square bolt with a 1-1/4″ diameter would require a 1-7/8″ wrench.

There is 1 spanner of each size:1/4 inch – 5/16 inch – 3/8 inch – 7/16 inch – 1/2 inch – 9/16 inch – 5/8 inch- 11/16 inch – 3/4 inch – 13/16 inch – 7/8 inch – 15/16 inch.

## What size is a 3 8 spanner?

Wrenches and spanners come in a variety of sizes to accommodate different objects and needs. To convert between US inches and metric mm, simply use a ruler or tape measure to determine the size in mm. For example, a 3/8 inch wrench would be equivalent to 95 mm.

Product details:

Ajay 1/2 Inch Drive Hex & Bi-Hex Socket Spanner, Size: 28 mm (Pack of 10) is a premium quality product from Ajay. It is made of high quality material and is very durable. This product is very easy to use and is very effective. It is available in a variety of sizes and is very affordable. This product is a must have for every home and is a great addition to your tool kit.

### What size spanner is between 13mm and 14mm

What size is a 3/4 L wrench?

Metric Wrench Size ChartBolt SizeDIN NumberWrench Size3/43/4-16mm171819mm111220 more rows

What are the different types of wrenches used?

There are eight adjustable wrenches: crescent, slugging, panel cut-off, tailpipe, pipe, open-end, combination and box-end wrenches. Each serves a different function in particular situations.

What is wrench used for?

A wrench is a tool that is used to rotate or turn a fastener, such as a bolt or screw. It is one of the most commonly used tools in any toolbox. There are many different types of wrenches, each designed for a specific purpose.

Most wrenches are made from steel or iron and have either a flat or a staggered ( serrated) jaw. The jaw is the part of the wrench that engages with the fastener. The size of the wrench is determined by the size of the jaw.

There are many different types of wrenches, each designed for a specific purpose. For example, a socket wrench is used to turn a socket, while a pipe wrench is

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. This can be helpful to know when creating or repairing something, as you can slightly adjust the hole size to make sure the bolt will fit properly.

## Are M8 bolts 8mm?

The M8 bolts have a thread diameter of 8mm, however, we stock a range of various lengths, meaning you are able to pick the right option for your next DIY project.

There is no chance to fit a M8 bolt to a 5/16 nut because the pitch of M8 threads is 125mm and the TPI (Threads Per Inch) of 5/16 UNC threads is 18, which can be converted to 141mm per pitch.

### What size wrench do I need for a 3/4 bolt

This is a US bolt head/wrench size table. The table lists the bolt diameter, head/wrench size, and torque value for various sizes of bolts.

There are a few different ways to measure things in inches, but the most common way is to use fractions. In this case, 18mm is just over 11/16 inch, and 19mm is 3/4 inch.

## How do you measure a 3/4 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.

For SAE bolts and nuts, the diameter measurement is usually the outer diameter of the threads. To find the right match, compare the outer diameter of the bolt to the inner diameter of the nut and washer. For example, a bolt with a major diameter of 3/16 inch is a #10 bolt.

## Final Words

There is no definitive answer to this question, as the required spanner size will vary depending on the specific bolt being used. In general, however, a bolt’s spanner size can be calculated by measuring the diameter of the bolt’s threading, and then selecting a spanner that is slightly larger in size. This will ensure that the spanner can properly grip the bolt, without being too large and causing damage to the bolt head.

If you are unsure of the size of spanner you need for a bolt, there are a few ways to calculate it. One way is to take the diameter of the bolt and divide it by 1.5. This will give you the size of spanner you need in inches. Another way is to take the bolt and measure from under the head to the end of the bolt. This will give you the size of spanner you need in millimeters.