# How do you choose spanner size?

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Multiply the first number which is the bolt size in inches or millimeters, by 1.5 using a pocket calculator, if necessary. For example, for the numbers in Step 1, 1/2 x 1.5 = . 75 or 3/4, which is the wrench size needed for this standard-sized bolt.

## How do I know what size spanner I need?

Spanner. The width across flats indicates the “size” of the spanner. It is imprinted on the spanners in millimeter (mm) values. Older British and current US spanners (wrenches) have inch sizes that are imprinted in intermediate sizes in fractions.

## How do you determine the spanner size of a bolt?

If the bolt size is up to M14,

1. Spanner size =(Bolt size*1.5)+1.
2. Eg. If Bolt size is M8, Then spanner size is (8*1.5)+1 =13.
3. If bolt size is above M14,
4. Spanner size = (Bolr size *1.5)
5. Eg. If bolt size is M16, Then spanner size is (16*1.5) = 24.

## How do I choose a spanner?

The profile of a spanner affects the stability of the connection between the spanner and nut. Profile that makes more contact with the nut like ring spanners has less probability of slipping in comparison to the one that only contacts a few sides of nuts. The thicker and wider the head is, the stronger it will be.

## What size is a 17 spanner?

Metric Spanner Sizes

Nominal Size Spanner Size
M10 17mm
M12 19mm
M14 22mm
M16 24MM

## What size is 3/4 spanner?

Imperial and Metric Spanner Sizes

BOLT DIAMETER (INCHES) AF SPANNER SIZE (INCHES) SPANNER SIZE (MM)
7/16 INCH 5/8 INCH 15.88 MM
11/16 INCH 17.46 MM
1/2 INCH 3/4 INCH 19.05 MM
9/16 INCH 7/8 INCH 22.22 MM

## What size bolt has a 24MM head?

Size Chart

Bolt size Size Tolerance
M16 24mm 24.46
25mm 25.46
1″ 25.86
9/16″BSW 26.23

## Which type of spanner is best?

Combination spanners offer the best of both worlds, combining two of the most popular spanner types in a double-ended tool. The open-ended spanner fits around two parallel sides of nuts and bolts, while a ring spanner grips the whole fastener from all sides.

## How do I calculate nut size?

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.

## What is the difference between a wrench and a spanner?

The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench—an adjustable pipe wrench. … In American English, spanner refers to a specialized wrench with a series of pins or tabs around the circumference.

## What is a 10mm spanner?

10mm Metric Chromed Ratchet Gear Spanner Fixed Head Combination Wrench. Tolsen 10mm metric combination wrench with head ratcheting gear spanner is suitable for professional or home mechanic. … It allows for easy access and turning of hard to reach bolts without displacing wrench from the bolt head or nut.

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## Does M8 mean 8mm?

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.

## What size socket is M10?

FLAT HEAD SOCKET CAP SCREW – METRIC

Size Head Diameter Hexagon Socket Size
M6-1.0 13.44 4.00
M8-1.25 17.92 5.00
M10-1.50 22.40 6.00
M12-1.75 26.88 8.00