ELECTRODE + FILLER SIZING

Since there are several common sizes of either filler material and consumable or non-consumable electrodes, here is a reference conversion table of imperial to metric. (Note, they're not perfect conversions, but how these values are typically used.)

Fractions of inch (") 1000ths of inch (") Metric (mm)
1/32 30/1000 0.8
40/1000 1.0
3/64 45/1000 1.2
1/16 63/1000 1.6
5/64 80/1000 2.0
3/32 94/1000 2.4
1/8 125/1000 3.2

Things to specify when ordering wire consumables:

Specification or classification of material.

Diameter of filler.

Length, for TIG rods, or spool size: D300 (12"), D200 (8"), D100 (4").

Amount of wire to be ordered, either in number of rods, spools or by weight.