# What is the metric equivalent of 1/4 bolt?

Contents

## What size is a 1/4 bolt in metric?

Metric / Standard Wrench Conversion Chart

Bolt Diameter Metric Standard
1/4″ 11mm 7/16″
5/16″ 13mm 1/2″
3/8″ 14mm 9/16″
7/16″ 16mm 5/8″

## Are M6 and 1/4 20 the same?

An M6 will thread a few turns into a 12-24 nut, but additional turns ruin the threads. Same with a 1/4″-20 and an M6. A metric/SAE screw gauge costs \$4. That’s a one-beer tool.

## What are the metric sizes of bolts?

Metric clearance and tapping drill hole sizes.

Size Clearance Hole mm Tapping Drill (std Pitch)
M5 5.5 4.2 mm
M6 6.5 5.0 mm
M8 9 6.75 mm
M10 11 8.5 mm

## What does m20 bolt mean?

M10-1.0 x 20

M = This designates the fastener is a metric size. 10 = The nominal diameter in millimeters. 1.0 = The thread pitch, or distance between threads, in millimeters. 20 = The fastener’s length, in millimeters.

## 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).

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## What are bolt sizes?

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.

## What is nominal dia of bolt?

The size most commonly associated with screw threads is the nominal diameter. Nominal diameter is a more of a label than a size. For example, a bolt and nut may be described as being ½” diameter. … In fact, the bolt diameter is a little smaller and the nut diameter a little larger.

## 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.

## What is a quarter 20 bolt in metric?

Fastener Conversion Chart

Inch Equivalent Metric Size-PitchISO and IFI Rec.
1/4- 20 1/4- 28 M6x 1
5/16-18 5/16- 24 M8x 1.25
3/8-16 3/8- 24 M10x 1.5
7/16-14 7/16- 20 M12x 1.75

## Are M6 and 1/4 interchangeable?

A normal M6 screw is a rattly fit in a 1/4 BSF full nut.

## Is my bolt metric or imperial?

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 are the most common metric bolt sizes?

The most common were the 12mm and 10mm, followed by the 15, 17 and 19mm.

## What does M12 mean?

6. Those are metric screw dimensions. M10 means a 10 millimeter outer diameter for the bolt or whatever piece it is; M12 means 12 millimeters. The part after the ‘x’ is the pitch — how many mm a thread is wide. To figure out which you have, you can measure the existing part with calipers and a thread gauge.