Whitworth's Standard Wire Gauge is given below. It will be seen that the number or mark of the gauge is the number of thousandths of an inch in the thickness : -

No. or Mark.

Thickness. Inch.

1

.001

2

.002

3

.003

4

•004

5

•005

6

•006

7

.007

8

•008

9

•009

10

•010

11

•on

12

.012

13

•013

No. or Mark.

Thickness. Inch.

14

•014

15

• 015

16

•016

17

•017

18

•018

19

•019

20

•020

22

•022

24

•024

26

•026

28

•028

30

•030

32

•032

No. or Mark.

Thickness. Inch.

34

•034

36

•036

38

•038

40

•040

45

•045

50

•050

55

•055

60

•060

65

•065

70

•070

75

•075

80

•080

85

•085

No. or Mark.

Thickness. Inch.

90

•090

95

•095

100

•100

110

•no

120

•120

135

•135

150

•150

165

•165

180

•180

200

•200

220

•220

240

•240

260

•260

No. or Mark.

Thickness. Inch.

280

•280

300

•300

325

•325

350

•350

375

•375

400

•400

425

•425

450

•450

475

•475

500

•500

The Birmingham Metal Gauge, also called the Metal Gauge or the Plate Gauge, is intended for sheet metals - except sheet iron and steel - such as copper, brass, gold, silver, etc.

Copper is, however, frequently sold by the Birmingham Wire Gauge given above, and by the special gauges of manufacturers.

1 Holtzapffel.