TIG Gas Nozzle (Collet Body or Gas Lens):

TIG Consumables - Gas Nozzles (Collet Body or Gas Lens) From L to R - Standard (long), Wide & Stubby.
Gas Nozzles (Collet Body or Gas Lens) From L to R – Standard (long), Wide & Stubby.

The shielding gas exits the gas nozzle (gas lens) and fills the gas cup that screws over and surrounds the gas nozzle.

TIG Gas Nozzle – Names Used:
Consumable Names Used
TIG Gas Nozzle Gas Nozzle
Gas Lens
Collet Body
Collet Bodies
Gas Assembly
1The name ‘Nozzle’ is sometimes used for the TIG gas cups.


TIG Gas Nozzle Types:

TIG Gas Nozzle ‘Sub’ Types – Names Used:
Nozzle Type Names Used
Standard Collet Body
Short Stubby
Wide Wide
Large Diameter
1Brand name.

The Different Types:

Standard (Long):

A bog standard gas nozzle (collet body). Great for straight forward TIG welding.


The ‘Stubby’ gas nozzle is basically a shortened version of the longer standard gas nozzle (to aid usage in tighter spaces).

Wide (Often Fitted with a Diffuser):

The ‘Wide’ gas nozzles are designed to give a good shielding gas coverage. A diffuser is often fitted, to try and focus the shielding gas. This often allows the tungsten electrode to protrude further from the gas cup, aiding visibility when welding in restricted spaces. They also allow for a shorter TIG gas cup to be fitted, giving easier access (with a now shorter TIG torch) in restricted spaces.

  • The ‘Standard’ collets are longer and may not fit the stubby or wide gas nozzles.
  • The collets for a ‘Wide’ gas nozzle may also fit a ‘Stubby’ gas nozzle. Do a physical check, or check the part numbers.
  • Make sure they fit your TIG torch before purchasing.

TIG Gas Nozzle Sizes:

Gas nozzles are available in a variety of sizes. The size of the hole in the middle, (to fit the different size Tungsten electrodes, typically between 1.0mm (0.040″) and 6.35mm (1/4″)) usually dictates the actual size given to the gas nozzle.

As you can see, the outside diameter tends to remain the same for a set of gas nozzles, however the length can vary and are often classified as standard (long), or stubby. The actual length may vary between manufacturers


The nozzles will need to fit the size of TIG torch being used. This is often split into two groups – See the article Which Parts Fit Which TIG Torch?

TIG Gas Nozzles - Sized for Different Tungsten Electrodes
TIG Gas Nozzles – Sized for Different Tungsten Electrodes

Buying TIG Gas Nozzles -Which Parts Fit?

TIG Welding Fittings Compatibility – Gas Cups & Nozzles
Cooled by: TIG Torch Gas Cup Thread Gas Nozzle
Torch Thread
Type1 Fittings Group Standard2 Stubby2
Air WP-9 A 3/8in UNF 9/16in UNF 5/16in UNF
Water WP-20
Air WP-17 B 13/32in UNS 3/4in UNF 3/8in UNF
Water WP-18
Air WP-26
This is only a guide, please refer to the manufacturers data sheets.
  • 1 Manufacturers may use a different code, sometimes replacing the first two letters with their own combination.
  • 2 There may be differences dependant on the gas nozzle fitted.

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