Temp.

Lead.

Tin.

400

11

8

410

25

16

420

7

4

430

15

8

440

8

4

450

17

8

460

9

4

470

10

4

480

23

8

Temp.

Lead.

Tin.

490

14

4

500

33

8

510

19

4

520

25

4

530

30

4

540

38

4

550

48

4

558

25

1

630

1

0

Gauges

Imperial Standard Wire Gauge - The following Table gives the thicknesses of the Standard Wire and Sheet Metal Gauges - sometimes described as the SWG - approved by Her Majesty's order in Council 1st March 1883 to be Board of Trade standards from 1st March 1884 : -